投稿時間:2022-07-19 21:33:24 RSSフィード2022-07-19 21:00 分まとめ(42件)

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IT	気になる、記になる…	Anker、｢楽天お買い物マラソン｣で46製品を最大30％オフで販売するセールを開催中（7月26日まで）	https://taisy0.com/2022/07/19/159273.html	anker	2022-07-19 11:09:04
IT	気になる、記になる…	楽天市場、ポイントが最大42倍になる｢お買い物マラソン｣のキャンペーンを開始（7月26日まで）	https://taisy0.com/2022/07/19/159271.html	楽天市場	2022-07-19 11:01:50
IT	ITmedia 総合記事一覧	[ITmedia PC USER] Intelの外付けグラボ「Intel Arc A750 Limited Edition」は“2022年夏の後半”に登場　情報を順次公開	https://www.itmedia.co.jp/pcuser/articles/2207/19/news191.html	ITmediaPCUSERIntelの外付けグラボ「IntelArcALimitedEdition」は“年夏の後半に登場情報を順次公開Intelのゲーミング向け独立GPU「IntelArcGraphics」のデスクトップ向け製品のリリースが近づいている。	2022-07-19 20:45:00
IT	ITmedia 総合記事一覧	[ITmedia News] 「ランチガチャ」みなとみらい駅に登場　1回1000円で1500～2000円分の食事券　決済はスマホで	https://www.itmedia.co.jp/news/articles/2207/19/news187.html	itmedia	2022-07-19 20:04:00
python	Pythonタグが付けられた新着投稿 - Qiita	いろんな言語での文字列操作の比較（VBA, Java, C#, PHP, Python, JavaScript）	https://qiita.com/miyakiyo/items/505b5e0482476de72a68	ajavacphppythonjavascript	2022-07-19 20:47:39
python	Pythonタグが付けられた新着投稿 - Qiita	pythonのパッケージをインポートする方法	https://qiita.com/tetraion/items/ec68cf0e7ae0a6350a05	jupyterlab	2022-07-19 20:12:46
js	JavaScriptタグが付けられた新着投稿 - Qiita	いろんな言語での文字列操作の比較（VBA, Java, C#, PHP, Python, JavaScript）	https://qiita.com/miyakiyo/items/505b5e0482476de72a68	ajavacphppythonjavascript	2022-07-19 20:47:39
golang	Goタグが付けられた新着投稿 - Qiita	Go言語とSQLiteでユニットテスト	https://qiita.com/RYO_/items/3e78f4641787091df50b	macbo	2022-07-19 20:59:22
golang	Goタグが付けられた新着投稿 - Qiita	go install でハマったこと	https://qiita.com/Gatsby/items/106236ac87dbfdddcb65	goinstall	2022-07-19 20:32:55
GCP	gcpタグが付けられた新着投稿 - Qiita	トラブル事案｜GCEでVMインスタンスへSSH接続できない	https://qiita.com/tomokei5634/items/73c2aaaed44a88c8c00c	permanentlyaddedxxx	2022-07-19 20:02:10
Azure	Azureタグが付けられた新着投稿 - Qiita	リソースロックの罠	https://qiita.com/hiro10149084/items/1f9c7a3a8ae26b7715d7	azure	2022-07-19 20:12:15
技術ブログ	Developers.IO	.NET Framework から .NET への互換性評価と移植支援を行うツール「Porting Assistant for .NET」が VB.NET をサポートしました	https://dev.classmethod.jp/articles/vb-net-porting-assistant-for-net/	vbnet	2022-07-19 11:34:02
海外TECH	DEV Community	Build and use embedded packages with Luos	https://dev.to/luos/build-and-use-embedded-packages-with-luos-46k8	Build and use embedded packages with LuosPackages represent these blocks of code They contain independent functionalities which will be run by Luos engine  Let s see how it works in our documentation page luos opensource microservices embedded edge	2022-07-19 11:38:08
海外TECH	DEV Community	Book Notes - How Linux Works	https://dev.to/ethand91/book-notes-how-linux-works-m9d	Book Notes How Linux Works The Big PictureComponents are arranged into layers levels classifications of components according to where the components sit between the user and the hardware A linux system has three main levelsThe hardware as the baseThe next level up is the kernel which is the core of the operating systemProcesses the running programs that the kernel manages collectively make up the system s upper level Called user spaceThere is a critical difference between how the kernel and the user processes run the kernel runs in kernel mode and the user proceesses run in user mode Code running in kernel mode has unrestricted access to the processor and main memoryThe memory area that only the kernel can access is called kernel spaceUser mode in comparison restricts access to a subset of memory and safe CPU operationsIf a process makes a mistake and crashes the consequences are limited and can be cleaned up by the kernelOf all the hardware on a computer system main memory is perhaps the most importantStrictly speaking a state is a particular arrangements of bitsNearly everything that the kernel does revolves around main memoryStrictly speaking a state is a particular arrangements of bitsNearly everything that the kernel does revolves around main memoryEach process gets its own share of memory and the kernel must ensure that each process keeps to its shareThe kernel is in charge of managing tasks in four general system areas processes memory device drivers system calls and supportProcess management describes the starting pausing resuming scheduling and terminating of processesModern CPUs include a memory management unit MMU that enables a memory access scheme called virtual memory When using memory a process does not directly access the memory by its physical location in the hardware Instead the kernel sets up each process to act as if it had an entire machine to itselfA system call is an interation between a process and the kernelThe kernel also supports user processes with features other than traditional system calls the most common of which are pseudodevices Pseudodevices look like devices to user processes but they re implemented purely in software This means they don t technically need to be in the kernel but they are usually there for pratical reasonsUser space also refers to the memory for the entire collection of running processes A user is an entity that can run processes and own filesOperating as root can be dangerous It can be difficult to identify and correct mistakes because the system will let you do anything even if it is harmful to the systemIn addition as powerful as root user is it still runs in the operating system s user mode not kernel mode Groups are sets of users The primary purpose of groups is to allow a user to share file access to other members of the a group Basic Commands And Directory HierachyA shell is a program that runs commandsUnix processes use I O streams to read and write data Processes read data from input streams and write data to output streamsThe shell can match simple patterns to file and directory names a process known as globbing This is the similiar to the concept of wildcards in other systemsIf you don t want the shell to expand a glob in a command enclose the glob in single quotesSearching with locate is much faster than find but if the file you re looking for is newer than the index locate won t find itAn environment variable is like a shell variable but it s not specific to the shell All processes on Unix systems have environment variable storageBecause child processes inherit environment variables from their parent many programs read them for configuration and optionsTo get serious with Unix you must be able to edit text files without damaging themYou should try to learn one of the two de facto standard Unix text editors vi and EmacsWhen you encounter a problem on a Unix system such as Linux you must read the error message Unlike messages from other operating systems Unix errors usually tell you exactly what went wrongWhen troubleshooting errors always address the first error firstWarnings often look like errors but they contain the word warning A warning usually means something is wrong but the program will try to continue running anywayA segmentation fault essentially means that the person who wrote the program that you just ran screwed up somewhere The program tried to access a part of memory that it was not allowed to touch and the operating system killed it Similarly a bus error means that the program tried to access some memory in a way it shouldn t haveEach process on the system has a numeric process ID PID Unlike other signals KILL cannot be ignored The kernel just terminates the process and forcibly removed it from memory Use this method only as a last resortYou should not kill processes indiscriminately especially if you don t know what you re doing To see if you ve accidently suspended any processes on your current terminal run the jobs commandEach unix file has a set of permissions that determine whatever you can read write or run the fileThe user permissions pertain to the user who owns the fileThe second set group permissions are for the file s groupEveryone else on the system has access according to the third set the other permissions which are sometimes called world permissionsSome executable files have an s in the user permissions listing instead of an x This indicates that the executable is setuid meaning that when you execute the program it runs as though the file owner is the user instead of youDirectories also have permissions You can list the contents of a directory if it s readable but you can only access a file in the directory if the directory is executable You need both in most casesWhen making a symbolic link check the command twice before you run it because several things can go wrongIf something goes wrong when you create a symbolic link to a directory check that directory for errant symbolic links and remove themSymbolic links can also cause headaches when you don t know that they existDon t forget the s option when creating a symbolic link Without it ln creates a hard link giving an additional real filename to a single fileBelow are the most important subdirectories in root bin contains ready ro run programs dev contains device files etc core system configuration directory home holds home personal directory for regular users lib an abbreviation for library this directory holds library files proc provides system statistics through a browsable directory and file interface run contains runtime data specific to the system sys similiar to proc in that it provides a device and system interface sbin the place for system executables tmp a storage area for smaller temprary files that you don t care much about If something is extremely important don t put it in tmp because most distributions clear tmp when the machine boots and some even remove its old files periodically usr although pronounced user this subdirectory has no user files Instead it contains a large directory hierachy including the bulk of the linux system var the variable subdirectory where programs record information that can change over the course of time boot contains kernel boot files media a base attachment point for recoverable media opt this may contain additional third party software Many systems don t use opt include holds header files used by the C compiler local is where administrators can install their own software man contains manual pages share contains files that should work on other kinds of Unix machines with no loss of functionalityOn linux systems the kernel is normally a binary file A boot loader loads this file into memory and sets it in motion when the system bootsOf course the system doesn t let just any user run commands as the super user you must configure the privileged users in your etc sudoers fileUse the visudo command to edit etc sudoers This command checks for file syntax errors after you save the file DevicesThe first character is the files mode If this character is b c p or s the file is a deviceBlock devicePrograms access data from a block device in fixed chunksBecause a block device s total size is fixed and easy to index processes have quick random access to any block in the device with the help of the kernelCharacter deviceCharacter devices work with data streamsCharacter devices don t have a size when you read from or write to one the kernel usually performs a read or write operation on itIt s important to not that during character device interaction the kernel cannot back up and reexamine the data stream after it has passed data to a device or processPipe deviceNamed pipes are like character devices with another process at the other end of the I O stream instead of a kernel driverSocker deviceSockets are special purpose interfaces that are frequently used for interprocess communicationThe dd command is very powerful so make sure you know what you re doing when you run it It s very easy to corrupt files and data on devices by making a careless mistakeMost hard disks attached to the current Linux systems correspond to device names with an sd prefix These devices represent entire disksLinux assigns devices to device files in the order in which its drivers encounter the devicesUnfortunately this device assignment scheme has traditionally caused problems when you are reconfiguring hardwareLinux has two primary display modes text mode and a graphical modeLinux has two sets of audio devices There are seperate devices for the Advanced Linux Sound Architecture ALSA system interface and the older Open Sound System OSS Linux sound is a messy subject due to the many layers involvedThe rules files are in the lib udev rules d and etc udev rules d directories The rules in the lib are the defaults and rules in etc are overridesSATA disks also appear on your system as SCSI devices but they are slightly different becuase most of them communicate through a translation layer in the libata librarySCSI subsystem has three layers of drivers The top layer handles operations for a class of deviceThe middle layer moderates and routes the SCSI messages between the top and bottom layers and keeps track of all of the SCSI buses and devices attached to the systemThe bottom layer handles hardware specific actions Disks and FilesystemsPartitions are subdivisions of the whole diskThe kernel presents each partition as a block device just as it would an entire disk Partitions are defined on a small area of the disk called a partition tableThe next layer up from the partition is the filesystem the database of files and directories that you re accustomed to interacting with in user spaceThere are many kinds of partition tables There s nothing special about a partition table it s just a bunch of data that says how the blocks on the disk are dividedPeople prefer the fdisk interface due to its interactive nature and the fact that it doesn t make any changes to the disk until you ve had a chance to review themA primary partition is a normal subdivision of the diskAn extended partition breaks down into logical partitions which the operating system can then use as it would any other partitionViewing partition tables is a relatively simple and harmless operation Altering partition tables is also relatively easy but making this kind of change to the disk involves risksMake sure you have a backup if the disk you re partitioning contains critical dataEnsure that no partitions on your target disk are currently in useWith fdisk you design your new partition table before making the actual changes to the disk and it makes the changes only when you exit the programAny device with moving parts introduces complexity into a software system because there are physical elements that resist abstractionStorage devices with no moving parts such as solid state disks SSDs are radically different from spinning disks in terms of their access characteristicsOne of the most significant factors affecting the performance of SSDs is partition alignment When you read data from an SSD you read it in chunks called pagesReasonably new versions of partitioning utilities include logic to put newly created partitions at the proper offsets from the beginning of the disks so you probably don t need to worry about improper partition alignmentThe last link between the kernel and user space for disks is typically the filesystemThe filesystem is a form of databaseThe Virtual File System VFS abstraction layer completes the filesystem implementationOn Unix the process of attaching a filesystem to a running system is called mountingAlmost all Linux systems include a temporary mount point mnt which is typically used for testingYou can identify and mount filesystems by their universally unique identifier UUID an industry standard for unique serial numbers to identify objects in a computer systemIt s much easier to mount a device by its name than by its crazy UUIDYou can change the UUID of a filesystem if necessaryLinux like other Unix variants buffers write to the diskWhen you unmount a filesystem with umount the kernel automatically synchronizes with the disk writing the changes in its buffer to the diskIf for some reason you can t unmount a filesystem before you turn off the system be sure to run sync firstFor filesystems to work seamlessly the kernel has to trust that a mounted filesystem has no errors and also that the hardware stores data reliably If errors exist data loss and system crashes may resultAside from hardware problems filesystem errors are usually due to a user shutting down the system in a rude way for example by pulling out the power cord Although many filesystems support journals to make filesystem corruption far less common you should always shutdown the system properlyNever use fsck on a mounted filesystem the kernel may alter the disk data as you run the check causing runtime mismatches that can crash your system and corrupt filesIf you think that something really bad has happened try running fsck n to check the filesystem without modifying anythingNot all filesystems represent storage on physical media Most versions of Unix have filesystems that serve as system interfacesNot every partition on a disk contains a filesystem It s also possible to augment the RAM on a machine with disk spaceHowever if you frequently access swap space because many active processes want to use the memory at once you ll suffer serious performace problems because disk I O is just to slow to keep up with the rest of the systemSometimes the Linux kernel may choose to swap out a process in favor of a little more disk cacheHigh performance servers should never dip into swap space and should avoid disk access if at all possibleIt s dangerous to configure no swap space on a general purpose machine If a machine completely runs out of both real memory and swap space the Linux kernel invokes the out of memory killer to kill a process in order to free up some memoryIt s rather nice that you expand an ext ext ext filesystem while it s mounted Unfortunately it doesn t work in reverrse You cannot shrink a filesystem when it s mountedHowever user space typically uses the block I O only for initializing operations such as partitioning filesystem creation and swap space creationA traditional Unix filesystem has two primary components a pool of data blocks where you can store data and a database system that manages the data pool How The Linux Kernel BootsThe best way to view the kernel s boot and runtime diagnostic messages is to retrieve the jounal for the kernel with the journalctl commandUpon startup the Linux kernel initializes in this general order CPU inspectionMemory inspectionDevices bus discoveryDevice discoveryAutiliary kernel subsystem setup network etc Root filesystem mountUser space startAt the start of the book process before the kernel and init start a boot loader program starts the kernelA boot loader does need a driver to access the disk but it s not the same one that the kernel usesGRUB stands for Grand Unified Boot LoaderOne of GRUBs most important capabilites is filesystem navigation that allows for easy kernel image and configuration selectionGRUB s use of the word root Normally you think of root as your system s root filesystem In GRUB configuration this is a kernel parameter located somewhere after the image name of the linux commandOne of the most important of these variables is prefix the filesystem and directory where GRUB expects to find its configuration and auxiliary supportThe GRUB configuration directory is usually boot grub or boot grubMake sure that you build the correct target it s different for MBR or UEFI bootOne newer problem affecting Linux installations is dealing with the secure boot feature found on recent PCs When active this UEFI mechanism requires any boot loader to be digitally signed by a trusted authority in order to runMajor Linux distributions have no problem with secure boot because they include signed boot loaders usually based on a UEFI version of GRUBYou can get around the secure boot requirement by disabling it in the UEFI settings However this won t work cleanly for dual boot systems since Windows won t run without secure boot enabledInstead of configuring and running a Linux kernel GRUB can load and run a different boot loader on a specific partition on your disk this is called chainloadingBoot loading schemes have several variations but there are two main ones MBR and UEFIBooting is radically different on UEFI systems compared toMBR How User Space StartsUser space starts in roughly this order initessential low level services such as udevd and syslogdnetwork configurationmid and high level services cron printing and so on Login prompts GUIs and high level applications such as web serversinit is a user space program like any other program on the Linux system and you ll find it in sbin along with many of the other system binaries Its main purpose is to start and stop the essential service processes on the systemOn all current releases of major Linux distributions the standard implementation of init is systemdThe systemd init is one of the newest init implementations on LinuxA unit for some system task A unit can contain instructions for common startup tasks such as starting a daemon and it also has dependencies which are other unitsBelow are the most significant unit types that perform the boot time taks on a typical Linux system Service units control the service daemons found on a Unix systemTarget units control other units usually by grouping themSocket units represent incoming network connection requestMount units represent the attachment of filesystems to the systemWhen you boot a system you re activating a default unit normally a target unit called default target that groups together a number of service and mount units as dependenciesTo prevent confusion stick to this rule avoid making changes to the system unit directory because your distribution will maintain it for you Make your local changes to the system configuration directoryWhen given the choice between modifying something in usr and etc always change etcThe Unit section gives some details about the unit and contains description and dependency informationYou ll find the details about the service in the Service section including how to prepare start and reload the serviceA specifier is a variable like feature often found in unit filesAdding units to systemd is primarily a matter of creating then activating and possibly enabling unit files You should normally put your own unit files in the system configuration directory etc systemd system so that you won t confuse them with anything that came with your distribution won t overwrite them when you upgradesystemd wants a reasonable amount of information and control over every process it startsThere are two basic startup types simple the service process doesn t fork and terminate it remains the main service processforking the service forks and systemd expects the original service process to terminateUnix boot time taks are fairly fault tolerant and can often fail without causing serious problems for standard servicesTo accommodate the need for flexibility and fault tolerance systemd offers several dependency types and styles Requires Strict dependencies When activating a unit with a Requires dependency unit systemd attempts to activate the dependency unit If the dependency unit fails systemd also deactivates the dependent unitWants Upon activating a unit systemd activates the unit s Wants dependencies but it doesn t care if those dependencies failRequisite Units that mush already be active If the dependency hasn t been activated systemd fails on activation of the unit with the dependencyConflicts When activating a unit with a Conflict dependency systemd automatically deactivates the opposing dependency if it s activeThe Wants dependency type is specially significant because it doesn t propagate failures to other unitsThis behavior produces a much more robust system giving you the benefit of traditional init where the failure of an earlier startup component doesn t necessary prohibit later components from startingActivating most service units with Require or Wants dependencies causes these units to start at the same time This is optimal because you want to start as many services as possible as quickly as possible to reduce boot timeEnabling a unit does not activate itThe Install section is usually responsible for the wants and requires directories in the system configuration directoryAn overall goal of systemd is to simplify dependency order and speed up boot timeIn System V init this state of the machine is called its runlevel which is denoted by a number from through Runlevels serve various purposes but the most common one is to distinguish between system startup shutdown single user mode and console mode statesA typical System V init installation has two components a central configuration file and a large set of boot scripts augmented by a smbolic link farm The configuration file etc inittab is where it all startsA large number of symbolic links accross several subdirectories like this is called a link farmTo start and stop services by hand use the script in the init d directoryWhen adding a service choose an appropiate place in the boot sequence to start it If the service starts too soon it may not work due to a dependency on some other serviceWhen switching runlevels init tries to kill off any processes not in the inittab file for the new runlevel so be careful when changing runlevelsThe proper way to shut down a Linux machine is to use the shutdown commandThe shutdown process takes several seconds You should avoid resetting or powering off a machine during a shutdownIf you specify a time other than now the shutdown command creates a file called etc nologin When this file is present the system prohibits logins by anyone except the superuserIf you really want to shut down your machine in a hurry regardless of any potential damage from a disorderly shutdown use the f force option System Configuration Logging System Time Batch Jobs And UsersThe widespread use of systemd has reduced the number of basic independent daemons found on a typical Linux systemMost system programs write their diagnostic output as messages to the syslog serviceA log message typically contains important information such as the process name process ID and timestampTo get full access to the journal messages you need to run journalctl either as root or as a user belonging to the adm or system journal groups The default user on most distributions has accessAny field beginning with an underscore is a trusted field the client that sends the message cannot alter these fieldsFiltering by severity sounds like it may save a lot of time but you might not find much use for itThe journals stored in var log journal don t need rotation because journald itself can identify and remove old messagesLogging on Linux systems has changed significantly during its history and it s a near certainty that it will continue to evolveMost system configuration files on a Linux system are found in etcUsernames exist only in user space so any program that works with a username needs to find its corresponding user ID when talking to the kernelOn most Linux systems the password is no longer actually stored in the passwd file but rather in the shadow fileYou should never have a user able to log in without a passwordUsers that cannot log in are called pseudo usersThe shadow file was introduced to provide a more flexible and perhaps more secure way of storing passwordsUnix machines depend on accurate timekeepingYour system clock should be as close to the correct time as possibleTime drift is the current difference between the kernel time and the true timeIf your machine is permanently connected to the internet you can run a Network Time Protocol NTP deamon to maintain the time using a remote serverMost Linux distributions include timesyncd and it s enabled by default You shouldn t need to configure itEach user can have their own crontab file which means that every system may have multiple crontabs usually found in var spool cron crontabsLinux distributions normally have an etc crontab file for the entire systemTo run a job once in the future without using cron use the at serviceTo check that the job has been scheduled use atq To remove it use atrm You can also schedule jobs days into the future by adding the date in DD MM YY formatWhen you temporarily switch to another user all you re really doing is changing your user IDIf you make a copy of the bash shell that is setuid root any local user can execute it and have complete run of the systemOne of the most essential ways to keep unwanted activity off your system is to enforce user authentication with usernames and good passwordsA multiuser system must provide basic support for user security in three areas identification authentication and authorization The identification portion of security answers the question of who users are The authorization piece asks users to prove that they are who they say they are Finally authorization is used to define and limit what users are allowed to do A Closer Look At Processes And Resource UtilizationThe ps command lists current processes and their usage statistics but it does little to tell you how processes change over time Therefore it won t immediately help you to determine which process is using too much CPU time or memoryIn Linux some processes are divided into pieces called threads A thread is very similiar to a processHowever unlike seperate processes which usually don t share system resources such as memory and I O connections with other processes all threads inside a single process share their system resources and some memoryA process with a single thread is single threaded and a process with more than one thread is multithreaded All processes start out single threaded This starting thread is usually called the main thread The main thread may start new threads making the process multithreadedIt s rare to refer to threads at all when a process is single threadedThreads offer a similar mechanism without the overhead of starting a new processYou can change the way the kernel schedules a process in order to give the process more or less CPU time than other processes The kernel runs each process according to its scheduling priorityThe higher the number the less likely the kernel is to schedule the process if others need CPU timeIn fact you probably won t need to alter nice values much because many Linux systems have only a single user and that user doesn t perform much real computationThe load average is the average number of processes currently ready to runIf a load average goes up to around a single process is probably using the CPU nearly all of the timeA high load average doesn t necessarily mean that your system is having trouble A system with enough memory and I O resources can easily handle many running processesHowever if the load average is very high and you sense that the system is slowing down you might be running into memory performance problemsThe kernel assists the MMU Memory Management Unit by breaking down the memory used by processes into smaller chunks called pages The kernel maintains a data structure called a page table that maps a process s virtual page address to real page addresses in memoryIf a memory page isn t ready when a process wants to use it the process triggers a page faultThere are two kinds of page faults minor and majorA minor page fault occurs when the desired page is acutally in main memory but the MMU doesn t know where it isMinor page faults are nothing to worry about and many occur as a process runsA major page fault occurs when the desired memory page isn t in main memory at all which means that the kernel must load it from the disk or some other slow storage mechanismSome major page faults are unavoidable such as those that occur when you load the code from disk when running a program for the first timeThe other reason the tools exist is that the resources are limited and for a system to perform well its components must strive to consume fewer resourcesLikewise high performance network servers require intense system resource monitoring because they run many processes to handle multiple requests simultaneously Userstand Your Network And Its ConfigurationsEach machine connected to the network is called a host One of these is a router which is a host that can move data from one network to anotherFor the most part you don t have to worry about translating between packets and the data that your application uses because the operating system does this for youA fully functioning network includes a set of network layers called a network stack Any functional network has a stackApplication layer contains the language that applications and servers use to communicate usually a high level protocol or some sortApplication layer processing occurs in user spaceTransport layer defines the data transmission characteristics of the application layerTransmission Control Protocol TCP and User Datagram Protocol UDP are the most common transport layer protocols The transport layer is sometimes called the protocol layerNetwork or internet layer defines how to move packets from a source host to a destination hostPhysical layer defines how to send raw data across a physical medium such as Ethernet or a modemIt s important to understand the structure of a network stack because your data must travel through these layers at least twice before it reaches a program at its destinationThe internet s topology is decentralized it s made up of smaller networks called subnets The idea is that all subnets are interconnected in somewayA subnet defined previously is a connected group of hosts with IP addresses in a particular rangeYou define a subnet with two pieces a network prefix and a subnet maskYou can configure a host without a default gateway but it won t be able to reach hosts outside the destinations in the routing tableThe last thing to know for now about IPv is that hosts normally have at least two addresses The first which is valid across the internet is called the global unicast address The second for the local network is called the link local addressFor security reasons some hosts on the internet disable response to ICMP echo request packets so you might find that you can connect to a website on a host but not get a ping responseOne of the key points to understand about the internet is that it s a software networkAll devices on an Ethernet network have a Media Access Control MAC address sometimes called a hardware addressDevices on an Ethernet network send messages in frames which are wrappers around the data sent A frame contains the origin and destination MAC addressesAlthough ip shows some hardware information it s designed primarily for viewing and configuring the software layers attached to the interfacesDifferent distributions have completely different implementations of ifup and ifdown and as a result their configuration files are also differentIn Linux there is a general agreement not to share configuration files among seperate tool suites or libraries because changes made for one tool could break anotherMost normal network client applications don t particularly care what IP address your machine uses as long as it worksWireless networks add further dimensions to interface configuration such as network names authentication and encryption techniquesThere are several ways to automatically configure networks in Linux based systems The most widely used option on desktops and notebooks is NetworkManagerNetworkManager is a deamon that the system starts upon bootUpon startup NetworkManager gathers all available network device information searches its list of connections and then decides to try to activate oneAfter establishing a connection NetworkManager maintains it until the connection is lost a better network becomes available of the user forces a changeOne of the final basic tasks in any network configuration is hostname resolution with DNSThe traditional configuration file for DNS servers it etc resolv confThe etc nsswitch conf is the traditional interface for controlling serveral name related precedence settings on your system such as user and password information and it has host lookup settingThe etc hosts file should be as short as possibleThe lo interface is a virtual network interface called the loopback because it loops back to itselfTransport layer protocols bridge the gap between the raw packets of the internet layer and the refined needs of applicationsA dynamically assigned port is called an ephemeral portOn Linux only processes running as the superuser can use ports through also known as systen well known or privileged portsTCP is popular as a transport layer protocol because it requires relatively little from the application sideProbably the most important thing to know about DHCP servers is that you want only one running on the same subnet in order to avoid problems with clashing IP addresses or incorrect configurationsRouters are just computers with more than one physical network interface You can easily configure a Linux machine to be a routerNAT is the most commonly used way to share a single IP address with a private network and it s nearly universal in home and small office networksThe basic idea behind NAT is that the router doesn t just move packets from one subnet to another it transforms them as it moves themRouters should always include some kind of firewall to keep undesirable traffic out of your network A firewall is a software and or hardware configuration that usually sits on a router between the internet and a smaller network attempting to ensure that nothing bad from the internet harms the smaller networkThere are two basic kinds of firewall scenarios one for protecting individual machines and one for protecting a network of machinesIn principle wireless Ethernet Wi Fi networks aren t much different from wired networksEverything at the network layer and above is the same the main differences are additional components in the physical layer such as frequencies network IDs and security featuresYou shouldn t use WEP because it s not secure and you won t find many networks that support it Network Applications And ServicesTCP services are among the easiest to understand because they are built upon simple uninterrupted two way data streamsSSH is the de facto standard for remote access to a Unix machineTunneling is the process of packaging and transporting one network connection within anotherOpenSSH has several host key sets Each set has a public key and a private keyIf you set up an SSH server on your machine and open it up to the internet you ll quickly discover constant intrusion attempts They will be annoying consume CPU time and unnecessarily clutter your logsIf you need more features and flexibility than what scp and sftp offer for example if you frequently transfer large numbers of files have a look at rsyncIf you need to do a lot of packet sniffing consider using a GUI alternative to tcpdump such as WiresharkBecause Linux is a very popular Unix flavor on the PC platform and especially because it is widely used for web servers it attracts many unpleasant characters who try to break into computer systemsRun as few services as possible intruders can t break into services that don t exist on your systemBlock as much as possible with a firewallTrack the services that you offer to the internet if you run an SSH server Postfix or similiar services keep your software up to date and get appropiate security alertsUse long term support distribution releases for serversDon t give an account on your system to anyone who doesn t need oneAvoid installing dubious binary packagesThere are three basic kinds of network attacks that can be directed at a Linux machine Full compromiseDoS attackMalwareSome services are chronic attack targets due to poor implementation and design You should always deactivate the following services ftpdtelnetd rlogind rexecdOn Unix systems a process uses a socket to identify when and how it s talking to the network Sockets are the interface that processes use to access the network through the kernel Introduction To Shell ScriptsThe shell script is only one tool for Unix programming and although scripts have considerable power they also have limitationsBe aware of your shell script sizes Keep you shell scripts shortWhen you use quotes you re often trying to create a literal a string that the shell should not analyze before passing it to the command lineThe easiest way to create a literal and make the shell leave a string alone is to enclose the entire string in single quotesWhen you need to use a literal you should always turn to single quotes first because you re guaranteed that the shell won t try any substitutionsDouble quotes work just like single quotes except that the shell expands any variables that appear within double quotes and all variables named as positive nonzero integers contain the values of the script parameters or argumentsThe built in shell command shift can be used with argument variables to remove the first argument and advance the rest of the arguments so that becomes becomes and so onThe variable holds the number of arguments passed to a script and is especially important when you re running shift in a loop to pick through argumentsThe variable holds the name of the script and is useful for diagnostic messagesThe variable holds the process ID of the shellThe variable holds the exit code of the last command the shell executedWhen the exit code is zero it typically means that the program ran without a problem However if the program has an error it usually exits with a number other than Note that some programs like diff and grep use nonzero exit codes to indicate normal conditionsIf you think a program might be using a nonzero exit code to indicate success read its manual pageThere are dozens of test operations all of which fall into three general categories file tests string tests and arithmetic testsThe awk command if not a simple single purpose command it s actually a powerful programming language Network File Transfer And SharingOn Linux rsync is the standard synchronizer offering good performance and many useful ways to perform transfersTo get rsync working between two hosts you must install the rsync program on both the source and destination and you ll need a way to access one machine from the otherThe standard file sharing suite for Unix is called SambaOne of the most commonly used traditional systems for file sharing among Unix systems is NFS User EnvironmentsIf you ve had your Linux machine for a while you might have noticed that your home directory accumulates a bafflingly large array of startup files over time These are sometimes called dot files because they nearly always start with a dotWhen designing startup files keep the user in mindSimplicity keep the number of startup files small and keep the files as short and simple as possible so that they re easy to modify but hard to breakReadability use extensive comments in files so that the users get a good picture of what each part of a file doesBefore making a change to a startup file ask yourself whether you really should be making itThe most important part of any shell startup file is the command pathMost Linux distributions install executables for nearly all packaged user software in usr binAs with shell startup files avoid large default editor startup filesAvoid these pitfalls in startup files Don t put any kind of graphical command in a shell startup fileDon t set the DISPLAY environment variable in a shell startup fileDon t set the terminal type in a shell startup fileDon t run commands in a startup file that print to the standard outputNever set LD LIBRARY PATH in a shell startup file A Brief Survey Of The Linux Desktop And PrintingAt the bottom of any graphical display mechanism is the framebuffer a chunk of memory that the graphics hardware reads and transmits to the screen for display Development ToolsMost Linux utilities and many applications on Linux systems are written in C or C Linking a program against a shared library doesn t copy the code into the final executable it just adds references to names in the code of the library fileThere is one more place that ld so looks for shared libraries the environment variable LD LIBRARY PATHThe number one cause of all shared library problems is the environment variable LD LIBRARY PATHNever set LD LIBRARY PATH is shell startup files or when compiling softwareIf you must use LD LIBRARY PATH to run some crummy program for which you don t have the source use a wrapper scriptThe default include directory in Unix is usr includeDouble quotes mean that the header file is not in a system include directory and usually indicate that the include file is in the same directory as the source fileThe first thing you need to know about any scripting language is that the first line of a script looks like the shebang if a Bourne shell script Introduction To Compiling Software Form C Source CodeYou probably shouldn t update your machine by installing everything from source code unless you really enjoy the process or have some other reasonBefore you unpack verify the contents of the archive with tar tvf or tar ztvf because some packages don t create their own subdirectories in the directory where you extract the archiveBeware of packages that contain files with absolute pathnamesThe most important environment variables are CPPFLAGS CFLAGS and LDFLAGSMany libraries now use the pkg config program not only to advertise the locations of their include files and libraries but also to specify the exact flags you need to compile and link a programIf you look behind the scenes you ll find that pkg config finds package information by reading configuration files that end with pcYou won t see pc files for many packages unless you install the development packagesIf you have a vital interest in network servers such as Apache the best way to get complete control is to install the servers yourselfIt s important to know the difference between an error and an ignored error VirtualizationOverseeing one or more virtual machines on a computer is a piece of software called a hypervisor or virtual machine monitorIn general a virtual machine with its operating system is called a guest The host is whatever runs the hypervisorCommon uses of virtual machinesTesting and trails virtual machines allow you to do this without having to purchase new hardwareApplication compatabilityServers and cloud services all cloud services are built on virtual machine technologyIf you don t remove docker images they can add up over time Depending on what s in the images and how they are built this can consume a significant amount of storage space on your systemYou can get the book from here Like me work I post about a variety of topics if you would like to see more please like and follow me Also I love coffee	2022-07-19 11:34:18
海外TECH	DEV Community	How I Integrated Live Chat into Gatsby with Tidio and Medusa	https://dev.to/medusajs/how-i-integrated-live-chat-into-gatsby-with-tidio-and-medusa-5a3i	How I Integrated Live Chat into Gatsby with Tidio and MedusaLive Chats on your ecommerce storefront allow you to communicate with your customers and provide them quick support Whether they need help finding a specific product or understand how they can make a purchase they can use the live chat feature on your ecommerce store to quickly chat with you Medusa is an open source headless commerce platform packed with plenty of ecommerce features One of Medusa s biggest advantages is how easy it is to customize your technical stack and integrate it with third party services In this tutorial you ll learn how to add live chat functionality to your ecommerce store using Medusa  Tidio live chat and Gatsby Storefront Why Add Live Chat to Your Ecommerce StoreSome of the reasons that make live chat an important ecommerce feature You get to interact with your customers online and in real time to provide them with the best service It drives more sales and leads Using chatbots allows you to bring to customers attention offers promotions and discounts that your store offers It empowers your customer support team as they can answer any queries from the customers in real time and help them out avoiding issues and miscommunications Why Use MedusaAs an open source platform Medusa gives developers and businesses complete tech stack ownership Developers also have the freedom to fully customize and extend the platform as fitting for the business use case This flexibility also translates into integrating third party services and tools easily You can integrate tools for live chat analytics notifications payment providers and more hassle free Why Use TidioTidio is a service that allows you to add live chat functionality to any website Specifically for ecommerce use cases it provides features such as tracking abandoned carts and custom product templates to automate responses that drive more sales Tidio also provides merchants and customer support agents with an easy to use interface to customize the live chat bot and communicate with customers For each visitor customer support agents can see important details such as their location or last viewed pages PrerequisitesBefore following along with this tutorial you need the following requirements Node js v or higher A Tidio account Set Up the Medusa ServerMedusa provides a CLI tool to easily set up a Medusa server To install the CLI tool run the following command npm install g medusajs medusa cliThen create a Medusa server using the following commandmedusa new medusa server store seedThis will create a new folder  medusa server store that hosts the medusa server files and code The above command uses the  seed option This adds dummy products and data to the Medusa server To run the server change to the newly created directory medusa server store and run the server medusa developYou can test your server by opening your browser and going to localhost store products Set Up the Gatsby StorefrontTo set up a Gatsby storefront ensure you have the Gatsby CLI installed npm install g gatsby cliYou can then install the Gatsby storefront gatsby new gatsby storefront This will create a new directory gatsby storefront that holds your storefront Change to that directory Then rename env template to   env development This holds the environment variable GATSBY MEDUSA BACKEND URL which by default is set to the server URL http localhost Finally make sure that the Medusa server is running then run the Gatsby storefront using the following command npm startOpen http localhost  in your browser You ll be able to browse all products and each product individually Set up Tidio for DevelopersAfter you register your Tidio account configure the design of the live chat including its color name and language After that fill the form on the left with your details then choose that you want to use Tidio for live chat Next choose how you would like to engage your customers once they enter your store for the first time These messages are customizable You can change them to your liking You can change these settings later from the settings Finally to Install the Tidio code on your store choose to “Show me the code Choose JavaScript from the list of platforms to integrate Tidio to This gives you a script to add to your JavaScript project Copy this script and save it for later use Finally click Continue and head to your Tidio chat panel At this moment you ll see on the chat panel that the chat code is not installed properly This is because you haven t installed the chat code yet on a frontend app In the next step you will add the Tidio script to the Gatsby storefront Add Tidio Live Chat to the Gatsby StorefrontIn the directory of your Gatsby storefront import src pages index js and import Helmet at the top of the file import Helmet from react helmet Helmet is a reusable React component exposed from the react helmet library that is used to add elements to the head of a webpage Then  add the Helmet component and the code snippet you copied from Tidio before the last closed div in the returned JSX of the component IndexPage lt Helmet gt lt script src code tidio co lt tidio code gt js async gt lt script gt lt Helmet gt lt div gt Finally run the Gatsby storefront server again and the Medusa server if they re not still running and open the storefront again You ll see a new chat bubble at the bottom right If you click the chat icon a chat widget will be displayed You can use the live chat to start chatting You can verify that you have connected Tidio to your storefront by checking the Tidio chat panel This will tell you whether the chat is correctly installed or not Test it Out As a CustomerYou can test the live chat feature by sending a message from your Gatsby storefront You ll receive messages instantly when the store operator replies to your messages As a Store OperatorWhen you open the Tidio panel new conversations will be shown on the Conversions tabs You can now join this conversation and chat with the customers Once you write to the customer the customer will receive your response immediately and you can engage with them based on the target conversation in realtime ConclusionImplementing live chat support on your site strengthens the trustworthiness of your company You can give your customers real time support and mitigate any issues early on You can integrate more services into Medusa for additional features including Stripe as a Payment Provider Contentful for advanced CMS functionalities SendGrid for email notifications Should you have any issues or questions related to Medusa then feel free to reach out to the Medusa team via Discord	2022-07-19 11:07:24
海外TECH	DEV Community	Sending Client-side Emails using EmailJs in ReactJs App	https://dev.to/adarshgoyal/sending-client-side-emails-using-emailjs-in-reactjs-app-58im	Sending Client side Emails using EmailJs in ReactJs AppGo to EmailJsCreate a free account you can send only emails per month in this account want more emails head to pricingCreate a email serviceCreate a email templateYou can choose the template id and service id you want or can genrate one if needed Setup a react project and install the module using npm install emailjs browser saveImport and use it in your project import emailjs from emailjs browser export const sendEmail templateParams gt emailjs send process env REACT APP EMAILJS SERVICE ID process env REACT APP EMAILJS TEMPLATE ID templateParams process env REACT APP EMAILJS PUBLIC KEY then result gt console log result text error gt console log error text Add REACT APP EMAILJS SERVICE ID REACT APP EMAILJS TEMPLATE ID REACT APP EMAILJS PUBLIC KEY to your env file do not forgot to restart the server after adding the variables That s it you are done with sending emails You can see your logs at events and email history at history Also you can add reCAPTCHA v and google analytics while sending the email If you have any query you can leave it in the comment Don t forgot to visit my webite and follow me Thank you	2022-07-19 11:06:41
Apple	AppleInsider - Frontpage News	Apple Silicon Linux project gets initial Mac Studio & M2 support	https://appleinsider.com/articles/22/07/19/apple-silicon-linux-project-gets-initial-mac-studio-m2-support?utm_medium=rss	Apple Silicon Linux project gets initial Mac Studio amp M supportThe Asahi Linux for Mac project has made some improvements with the latest version adding initial support for M chips as well as the Mac Studio along with Bluetooth A project to port Linux to Apple Silicon Macs Asahi Linux released an update in July that includes a number of significant steps forward Building on top of its existing work its first change is that Mac Studio support is now included The team admits in a blog post that it wasn t hard to add support for the Mac Studio but that it did require some changes to the project s boot loader and device trees This was done in order to handle the idea of one SoC with multiple dies as in M Ultra Read more	2022-07-19 11:10:00
Apple	AppleInsider - Frontpage News	What you need to know about JPEG, HEIF, HEIC, and ProRAW	https://appleinsider.com/articles/22/07/19/what-you-need-to-know-about-jpeg-heif-heic-and-proraw?utm_medium=rss	What you need to know about JPEG HEIF HEIC and ProRAWYour iPhone iPad and Mac natively support a variety of image formats With JPEG HEIF and ProRAW being the most common here s what they mean and how to pick between them A huge variety of image formats are supported on iOS iPadOS and macOS with each format having a specific purpose and expected usage When it comes to photography using your iPhone and iPad the list can be shortened to a few commonly used types The camera on iPhone and iPad natively supports JPEG and HEIF With an iPhone Pro running iOS or later the sensor can even capture in ProRAW Read more	2022-07-19 11:06:48
海外TECH	Engadget	The Morning After: The 68GB SSD floating inside the James Webb Space Telescope	https://www.engadget.com/the-morning-after-the-68-gb-ssd-floating-inside-the-james-webb-space-telescope-111521057.html?src=rss	The Morning After The GB SSD floating inside the James Webb Space TelescopeWith the James Webb Space Telescope JWST now powered up and snapping some spectacular images some of them huge captures where does it put them all On an SSD of course It s a relatively tiny GB SSD according to IEEE Spectrum which is just enough to handle a day s worth of JWST images ahead of broadcasting them back to Earth Why so humble in size The JWST is a million miles from Earth getting bombarded by radiation and temperatures of less than degrees above absolute zero degrees F So the SSD like all other parts must be radiation hardened Samsung s latest pro level SSD might not cut it Plus JWST sends data back to Earth much faster than Hubble up to GB in the four hours it s in range each day It seems like just about enough storage Mat SmithThe biggest stories you might have missedThe best free tools and services for college studentsAmazon makes Prime Video look more like Netflix and every other streaming app Records reveal the scale of Homeland Security s phone location data purchasesSnapchat s messaging and calling features land on a new set of screens Crunchyroll is lowering monthly subscription fees in almost regionsApple s latest iPad mini with LTE is off at AmazonUS Congress calls for the FTC to regulate how VPN companies operateThree quarters of popular VPNs misrepresented their products the letter states US Democrats have urged the FTC to crack down on deceptive practices in the Virtual Private Network VPN industry In an open letter Representative Anna Eshoo D CA and Senator Ron Wyden D OR cited research indicating that three quarters of the most popular VPNs misrepresented their products leading consumers to have a false sense of security Continue reading Lucid s Air Grand Touring EV delivers luxurious speed and rangeThe only decision is just how fast do you want to get to miles per hour LucidWe were impressed with the Lucid Air Dream Edition earlier this year even though it was just a pre production vehicle Well the automaker gave us time behind the wheel of its latest top of the line Grand Touring Performance model with all the proper hardware and software ready to go The Lucid Air GT models are shaping up to be more than just fast electric sedans Check out our test drive Continue reading Stray review A cute and contained cyberpunk adventure gamePlay as a cat just like you always wanted StrayStray is a cyberpunk playground where players are rewarded for trusting their instincts and it offers a beautiful balance of exploration puzzle solving and soothing cat activities And somehow manages to tell a heart wrenching human story without any people at all Cat people are going to love it says Engadget s Jessica Conditt and she s one of our resident dog people Continue reading UK forces Meta to halt its forced sale of GiphyA court orders the antitrust watchdog to review the original decision The UK s Competition Appeal Tribunal has ordered the country s antitrust watchdog to review its decision to force Meta to sell Giphy “We have agreed to reconsider our decision in light of this finding a spokesperson for the Competition and Markets Authority CMA told the outlet adding the agency hopes to complete the process within three months The ruling comes after the tribunal sided with the watchdog on five of the agency s six claims against the company However on the one ruling that went in Meta s favor the tribunal said the CMA had failed to properly inform the company of Snapchat s acquisition of Gfycat undermining its defense Continue reading	2022-07-19 11:15:21
海外科学	NYT > Science	Where Dalí Once Painted the Sea, Wind Turbines Are Set to Rise	https://www.nytimes.com/2022/07/19/climate/spain-floating-wind-farm.html	Where DalíOnce Painted the Sea Wind Turbines Are Set to RiseContentious plans to erect a wind farm off the northeastern coast of Spain are part of a tense debate over where to locate new renewable energy projects across Europe	2022-07-19 11:19:42
海外科学	NYT > Science	What’s Behind Europe’s Heat Waves?	https://www.nytimes.com/2022/07/18/climate/europe-heat-wave-science.html	stream	2022-07-19 11:51:44
海外ニュース	Japan Times latest articles	Terunofuji overpowers Sadanoumi to tie with 3 others for lead	https://www.japantimes.co.jp/sports/2022/07/19/sumo/basho-reports/nagoya-basho-day-10/	Terunofuji overpowers Sadanoumi to tie with others for leadThe Mongolian born grand champion bidding for his eighth Emperor s Cup wrapped up the maegashira at the jump and bulldozed him straight back over the straw	2022-07-19 20:27:06
ニュース	BBC News - Home	UK heatwave: Temperatures still rising after record broken before noon	https://www.bbc.co.uk/news/uk-62217282?at_medium=RSS&at_campaign=KARANGA	temperatures	2022-07-19 11:47:36
ニュース	BBC News - Home	Heatwave: Ferocious European heat heads north	https://www.bbc.co.uk/news/world-europe-62216159?at_medium=RSS&at_campaign=KARANGA	record	2022-07-19 11:16:32
ニュース	BBC News - Home	Apple sued over Apple Pay payment system	https://www.bbc.co.uk/news/technology-62221412?at_medium=RSS&at_campaign=KARANGA	industry	2022-07-19 11:25:10
ニュース	BBC News - Home	Queen's Greatest Hits sells seven million copies, breaking UK chart record	https://www.bbc.co.uk/news/entertainment-arts-62209993?at_medium=RSS&at_campaign=KARANGA	chart	2022-07-19 11:03:17
ニュース	BBC News - Home	Sri Lanka's tea farmers struggling to survive	https://www.bbc.co.uk/news/world-asia-62221355?at_medium=RSS&at_campaign=KARANGA	crisis	2022-07-19 11:24:26
ニュース	BBC News - Home	Heatwave: Why your phone overheats and how to prevent it	https://www.bbc.co.uk/news/newsbeat-62223245?at_medium=RSS&at_campaign=KARANGA	electronics	2022-07-19 11:21:28
北海道	北海道新聞	フィギュア王国からねぎらう声　羽生と親交のロシア選手ら	https://www.hokkaido-np.co.jp/article/707642/	羽生結弦	2022-07-19 20:39:00
北海道	北海道新聞	聖地「弓弦羽神社」からエール　「違う頂、納得いくまで」	https://www.hokkaido-np.co.jp/article/707630/	弓弦羽神社	2022-07-19 20:23:20
北海道	北海道新聞	プロ転向の羽生、終始晴れやか　記者会見に１５０人	https://www.hokkaido-np.co.jp/article/707640/	晴れやか	2022-07-19 20:32:00
北海道	北海道新聞	巨人、畠や高橋ら１７人陽性　広島のターリーらも	https://www.hokkaido-np.co.jp/article/707613/	新型コロナウイルス	2022-07-19 20:06:42
北海道	北海道新聞	岸元首相と「近かった」　旧統一教会元ナンバー２が会見	https://www.hokkaido-np.co.jp/article/707591/	世界平和統一家庭連合	2022-07-19 20:34:47
北海道	北海道新聞	スリランカ大統領選、２０日投票　事実上一騎打ちに、議会が選出	https://www.hokkaido-np.co.jp/article/707641/	一騎打ち	2022-07-19 20:32:00
北海道	北海道新聞	三重で弁護士懲戒　破産企業に財産保全させず	https://www.hokkaido-np.co.jp/article/707639/	三重弁護士会	2022-07-19 20:30:00
北海道	北海道新聞	自民党安倍派、後任会長置かず　塩谷元文科相が窓口に	https://www.hokkaido-np.co.jp/article/707633/	清和政策研究会	2022-07-19 20:26:00
北海道	北海道新聞	脱炭素へ協定　会沢高圧コンクリートとケイコン、２０３５年の排出量ゼロ目指す	https://www.hokkaido-np.co.jp/article/707632/	高圧	2022-07-19 20:22:00
北海道	北海道新聞	教諭２人を懲戒処分　札幌市教委	https://www.hokkaido-np.co.jp/article/707631/	交通事故	2022-07-19 20:19:00
北海道	北海道新聞	８～１０月の道内気温、平年並みか高め　札幌管区気象台予報	https://www.hokkaido-np.co.jp/article/707623/	平年並み	2022-07-19 20:15:14
IT	週刊アスキー	レモンサワー、ハイボールが破格の90円!! 「やよい軒」夏休み限定キャンペーン	https://weekly.ascii.jp/elem/000/004/098/4098370/	期間限定	2022-07-19 20:30:00
IT	週刊アスキー	PS5／PS4／Switch『アリスギアCS』で「二子玉 舞」と「バージニア・グリンベレー」の最新プロモーションムービーを公開！	https://weekly.ascii.jp/elem/000/004/098/4098498/	PSPSSwitch『アリスギアCS』で「二子玉舞」と「バージニア・グリンベレー」の最新プロモーションムービーを公開MAGESは、NintendoSwitchPlayStationPlayStation用ソフトD対戦アクションゲーム『アリス・ギア・アイギスCSコンチェルトオブシミュラトリックス』の最新プロモーションムービーを、年月日と日に公開した。	2022-07-19 20:30:00
IT	週刊アスキー	放送中のアニメ『シャインポスト』のテレビCMが新たに公開！ゲーム版の映像がついにお披露目か	https://weekly.ascii.jp/elem/000/004/098/4098459/	youtube	2022-07-19 20:05:00