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UNIX-1.2 UNIX Introduction and Basic Commands Tutorial

Linus Torvalds Birth-Date Begins Writing Code Joins the Finnish Army First Linux Prototypes Publicly Released Receives His First Copy of UNIX Linux Version 1.0 is Released Finishes His M.Sc Thesis Inducted into the Internet Hall of Fame

Mauro e i Post

【中古】 TurboLinuxで始めようPCーUNIXプログラミングはじめてのBash　＆　Perl / 中嶋禎 / ディー・アート [単行本]【宅配便出荷】

Unix Tutorial Part 1,Unix Operating System

The Evolution and Future of Computer Technology The loom was born Steam-driven calculating machine punch card system Universal Machine An attempt to build computer First Computer made the Electronic Numerical Integrator and Calculator The first Commercial computer The Transistor The first computer language FORTRAN Language The Computer Chip A Modern computer UNIX operating system the first Dynamic Access Memory Chip The floppy Disk The Ethernet!!!!! The Seclbi & Mark-8 Altair, IBM 5100, RadioShack TRS-80 (Trash 80) The Altair 8080 THE APPLE COMPUTERS Radio Shack Runs Out The Apple Inc. is made VisiCalc the first computerized spreadsheet Micropro releases Worldstar The first IBM personal computer code-named "Acorn" The first personal computer with a GUI from Apple named Lisa

Sun Sunsoft Solaris 2.5.1 400-2288-01 Server Sparc プラットフォーム Oracle Unix 新品 01-

【中古】 TurboLinuxで始めようPCーUNIXプログラミングはじめてのBash　＆　Perl / 中嶋禎 / ディー・アート [単行本]【メール便送料無料】

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Introduction To UNIX Operating System

Original Msx cartridge!

【中古】C言語プログラミング雑記帳 PC-UNIX 第1集/工学社/大村正道（単行本）

How to Check Path in Unix

Sistemas Operativos de red UNIX Novell Netware LANtastic LAN Manager NetWare Lite / Personal NetWare GNU/Linux Windows NT Mac OS X Server 1.0 (Rhapsody) Windows 2000 Server

Architecture of UNIX operating system with diagram

【中古】FreeBSD徹底活用 PC-UNIXを本当に使いこなしたいあなたに 2（アプリケ-ション編） /翔泳社/あさだたくや（単行本）

Unix Interview Questions

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【中古】超図解Linux イントラネットサ-バ-編 /エクスメディア/PC-UNIX研究会（単行本）

Unix Electrical

It's a Unix system....

unix

【中古】PC-UNIX日本語環境＋アプリケ-ション徹底入門 OSインスト-ル後の実践的使いこなしガイド/技術評論社/桐山和彦（単行本）

Cos’è UNIX | Cos’è LINUX | Cos’è GNU

Lab Session 01

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【中古】超図解Linux イントラネットサーバー編 / PC－UNIX研究会 / エクスメディア [単行本]【宅配便出荷】

Review your most oft-used UNIX commands

GNU/LinuxxPor que GNU não é UNIX? – Crônicas do Sistema

Flowchart of evolution from UNIX

【中古】FreeBSD徹底活用 PC-UNIXを本当に使いこなしたいあなたに 1 /翔泳社/天川修平（単行本）

» Recupero dati Server Unix

unix architecture, architecture of unix, unix architecture diagram, unix kernel architecture, unix os architecture

Kryptora.

【中古】超図解Linux イントラネットサーバー編 / PC－UNIX研究会 / エクスメディア [単行本]【ネコポス発送】

UNIX Operating System : Brief Technical Perspective

Conviértete en un experto de UNIX y redes con el último Humble Bundle

Unix

【中古】LinuxプラスWindows PC-UNIX /蕗出版/前原輝雄（単行本）

50 Unix Interview Questions and Answers (2023)

UNIX Knowledge For Software Testers

$How To Update atime and mtime for a File in UnixUnix TutorialIf you remember, all files and directories in Unix filesystems have three timestamps associated with them – atime, ctime and mtime. Since questions about modifying access time (atime) and modification time (mtime) are quite frequent in my website logs, I thought I’d explain how it is done.How to view atime, ctime and mtimeBefore we go any further, I’d like to remind you that using stat command is probably the easiest way to look at all the three timestamps associated with each file:ubuntu$ stat ./tryFile: `./try'Size: 0 Blocks: 0 IO Block: 4096 regular empty fileDevice: 801h/2049d Inode: 655596 Links: 1Access: (0644/-rw-r--r--) Uid: ( 1000/ greys) Gid: ( 113/ admin)Access: 2008-11-17 05:01:16.000000000 -0600Modify: 2008-11-17 05:01:16.000000000 -0600Change: 2008-11-17 05:01:16.000000000 -0600Even though ls command can be used to view the same times, we will depend on the stat command for today’s post simply because it shows all the times together – it’s great for explanations.Modifying atime and mtimeThere’s a very simple way to update either atime or mtime for a given file, or even both at the same time: you should use the touch command.Here’s how it can be used to update the atime:ubuntu$ touch -at 0711171533 ./tryThe -a in the command line parameters refers to atime, while -t and the following sequence are nothing but a timestamp we want assigned to the file. In my example, 0711171533 means this:07 – year of 200711 – November17 – 17th1533 – time of the day, 15:33 Now, if we run stat command again, you can see how the access time field got updated:ubuntu$ stat ./tryFile: `./try'Size: 0 Blocks: 0 IO Block: 4096 regular empty fileDevice: 801h/2049d Inode: 655596 Links: 1Access: (0644/-rw-r--r--) Uid: ( 1000/ greys) Gid: ( 113/ admin)Access: 2007-11-17 15:33:00.000000000 -0600Modify: 2008-11-17 05:01:16.000000000 -0600Change: 2008-11-17 05:01:48.000000000 -0600Similarly, we can set the mtime, in my particular example it’s the future – a day exactly one year from now.-m is the command line option to specify that mtime is our main focus:ubuntu$ touch -mt 0911171533 ./tryubuntu$ stat ./tryFile: `./try'Size: 0 Blocks: 0 IO Block: 4096 regular empty fileDevice: 801h/2049d Inode: 655596 Links: 1Access: (0644/-rw-r--r--) Uid: ( 1000/ greys) Gid: ( 113/ admin)Access: 2007-11-17 15:33:00.000000000 -0600Modify: 2009-11-17 15:33:00.000000000 -0600Change: 2008-11-17 05:05:41.000000000 -0600Changing atime and mtime to the current Unix timeIt’s probably useful to know that the default behavior of the touch command is to update both access time and modification time of a file, changing them to the current time on your system. Here’s what will happen if I run touch against the same file we used in all the examples:ubuntu$ touch ./tryubuntu$ stat ./tryFile: `./try'Size: 0 Blocks: 0 IO Block: 4096 regular empty fileDevice: 801h/2049d Inode: 655596 Links: 1Access: (0644/-rw-r--r--) Uid: ( 1000/ greys) Gid: ( 113/ admin)Access: 2008-11-17 05:09:33.000000000 -0600Modify: 2008-11-17 05:09:33.000000000 -0600Change: 2008-11-17 05:09:33.000000000 -0600As you can see, all three fields have been reset to the new (current time) value. That’s it for today, I hope this solved another one of your Unix mysteries!See alsomtimeatime, ctime and mtime in Unixfind out file permissions using Perl scriptfind mtime: identify recent files in Unixtime and date in Unix scripts var disqus_config = function () { this.page.url = 'https://www.unixtutorial.org/how-to-update-atime-and-mtime-for-a-file-in-unix/'; }; (function() { var d = document, s = d.createElement('script'); s.src = '//glebreys.disqus.com/embed.js'; s.setAttribute('data-timestamp', +new Date()); (d.head || d.body).appendChild(s); })(); Please enable JavaScript to view the comments powered by Disqus.$

How To Update atime and mtime for a File in UnixUnix TutorialIf you remember, all files and directories in Unix filesystems have three timestamps associated with them – atime, ctime and mtime. Since questions about modifying access time (atime) and modification time (mtime) are quite frequent in my website logs, I thought I’d explain how it is done.How to view atime, ctime and mtimeBefore we go any further, I’d like to remind you that using stat command is probably the easiest way to look at all the three timestamps associated with each file:ubuntu$ stat ./tryFile: `./try'Size: 0 Blocks: 0 IO Block: 4096 regular empty fileDevice: 801h/2049d Inode: 655596 Links: 1Access: (0644/-rw-r--r--) Uid: ( 1000/ greys) Gid: ( 113/ admin)Access: 2008-11-17 05:01:16.000000000 -0600Modify: 2008-11-17 05:01:16.000000000 -0600Change: 2008-11-17 05:01:16.000000000 -0600Even though ls command can be used to view the same times, we will depend on the stat command for today’s post simply because it shows all the times together – it’s great for explanations.Modifying atime and mtimeThere’s a very simple way to update either atime or mtime for a given file, or even both at the same time: you should use the touch command.Here’s how it can be used to update the atime:ubuntu$ touch -at 0711171533 ./tryThe -a in the command line parameters refers to atime, while -t and the following sequence are nothing but a timestamp we want assigned to the file. In my example, 0711171533 means this:07 – year of 200711 – November17 – 17th1533 – time of the day, 15:33 Now, if we run stat command again, you can see how the access time field got updated:ubuntu$ stat ./tryFile: `./try'Size: 0 Blocks: 0 IO Block: 4096 regular empty fileDevice: 801h/2049d Inode: 655596 Links: 1Access: (0644/-rw-r--r--) Uid: ( 1000/ greys) Gid: ( 113/ admin)Access: 2007-11-17 15:33:00.000000000 -0600Modify: 2008-11-17 05:01:16.000000000 -0600Change: 2008-11-17 05:01:48.000000000 -0600Similarly, we can set the mtime, in my particular example it’s the future – a day exactly one year from now.-m is the command line option to specify that mtime is our main focus:ubuntu$ touch -mt 0911171533 ./tryubuntu$ stat ./tryFile: `./try'Size: 0 Blocks: 0 IO Block: 4096 regular empty fileDevice: 801h/2049d Inode: 655596 Links: 1Access: (0644/-rw-r--r--) Uid: ( 1000/ greys) Gid: ( 113/ admin)Access: 2007-11-17 15:33:00.000000000 -0600Modify: 2009-11-17 15:33:00.000000000 -0600Change: 2008-11-17 05:05:41.000000000 -0600Changing atime and mtime to the current Unix timeIt’s probably useful to know that the default behavior of the touch command is to update both access time and modification time of a file, changing them to the current time on your system. Here’s what will happen if I run touch against the same file we used in all the examples:ubuntu$ touch ./tryubuntu$ stat ./tryFile: `./try'Size: 0 Blocks: 0 IO Block: 4096 regular empty fileDevice: 801h/2049d Inode: 655596 Links: 1Access: (0644/-rw-r--r--) Uid: ( 1000/ greys) Gid: ( 113/ admin)Access: 2008-11-17 05:09:33.000000000 -0600Modify: 2008-11-17 05:09:33.000000000 -0600Change: 2008-11-17 05:09:33.000000000 -0600As you can see, all three fields have been reset to the new (current time) value. That’s it for today, I hope this solved another one of your Unix mysteries!See alsomtimeatime, ctime and mtime in Unixfind out file permissions using Perl scriptfind mtime: identify recent files in Unixtime and date in Unix scripts var disqus_config = function () { this.page.url = 'https://www.unixtutorial.org/how-to-update-atime-and-mtime-for-a-file-in-unix/'; }; (function() { var d = document, s = d.createElement('script'); s.src = '//glebreys.disqus.com/embed.js'; s.setAttribute('data-timestamp', +new Date()); (d.head || d.body).appendChild(s); })(); Please enable JavaScript to view the comments powered by Disqus.