Understanding Linux CPU stats | Scout Monitoring
Updated version of an article first published on February 24th, 2015. Your Linux server is running slow, so you follow standard procedure and run top. You see the CPU metrics: But what do all of those 2-letter abbreviations mean? The 3 CPU states Let’s take a step back. There are 3 general states your CPU can be in: Idle, which means it has nothing to do. Running a user space program, like a comma
process-book
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https://google-styleguide.googlecode.com/svn/trunk/shell.xml
Revision 1.26 Paul Armstrong Too many more to mention Bash is the only shell scripting language permitted for executables. Executables must start with #!/bin/bash and a minimum number of flags. Use set to set shell options so that calling your script as bash <script_name> does not break its functionality. Restricting all executable shell scripts to bash gives us a consistent shell language that'
Auto-closing SSH tunnels
In some of my older articles, at least where an SSH tunnel is involved, I keep mentioning a specific way of initializing such an encrypted tunnel, which results in the automatic closure of the tunnel after the job on the remote server is finished. Since this is my method of choice, I decided to provide some detailed explanation in this post, so that it can be used as a reference in future articles
独習Linux専科をèªã‚“ã§ã¿ãŸ - qphoney記
明ã‘ã¾ã—ã¦ãŠã‚ã§ã¨ã†ã”ã–ã„ã¾ã™ã€‚ 2014å¹´ã‚‚ã©ã†ãžã‚ˆã‚ã—ããŠé¡˜ã„申ã—上ã’ã¡ã‚ƒã„ã¾ã™ã€‚ 先日ã€æŠ€è¡“評論社様ã‹ã‚‰ã€Œç‹¬ç¿’Linux専科 〜サーãƒæ§‹ç¯‰/é‹ç”¨/ç®¡ç† ã‚ãªãŸã«ä¼ãˆãŸã„技ã¨çŸ¥æµã¨é‰„則〜ã€ã‚’ã„ãŸã ã„ãŸã®ã§èªã‚“ã 感想をブãƒã‚°ã«æ›¸ã„ã¦ã¿ã¾ã™ã€‚ 「独習Linux専科ã€ã‚µãƒ¼ãƒæ§‹ç¯‰/é‹ç”¨/ç®¡ç† â€•â€•ã‚ãªãŸã«ä¼ãˆãŸã„技ã¨çŸ¥æµã¨é‰„則 (Software Design plus) [大型本] 本書ã®ã€Œã¯ã˜ã‚ã«ã€ã«ã‚‚ã‚るよã†ã«ã€Linuxåˆå¿ƒè€…を対象ã¨ã—ãŸå…¥é–€æ›¸ã¨ãªã£ã¦ã„ã¾ã™ã€‚ Linuxã£ã¦ä½•ã ã‹åˆ†ã‹ã‚‰ãªã„ã‘ã©ä»•äº‹ã§ä½¿ã†äº‹ã«ãªã£ãŸã€ã¨ã„ã†æ–¹ã®å…¥é–€æ›¸ã¨ã—ã¦ã€åƒ•ã®ã‚ˆã†ã«Linuxã‚’æ¥å‹™ã§ä½¿ã£ã¦ã„ã‚‹ã‘ã©åŸºç¤ŽçŸ¥è˜ãŒæ€ªã—ã„人ãŒçŸ¥è˜ã®æ•´ç†ã‚„ãŠã•ã‚‰ã„ã®ãŸã‚ã«ãƒ”ッタリã®æœ¬ã¨ãªã£ã¦ã„ã¾ã™ã€‚ 本書ã¯å…¨5ç« ã‹ã‚‰æ§‹æˆã•ã‚Œã¦ã„ã¦ã€Linuxã£ã¦ä½•ï¼Ÿã®1ç« ã‹ã‚‰å®Ÿéš›ã«æ‰‹ã‚’å‹•ã‹ã—ã¦ç°¡å˜ãªã‚¢ãƒ—リケーションを動ã‹ã—ã¦ã¿ãŸã‚Šã€Linuxã®
Matthew Garrettã€é–‹ç™ºè€…ã«MacユーザーãŒå¤šã„ã“ã¨ã«ã¤ã„ã¦èªžã‚‹
mjg59 | The desktop and the developer Matthew GarrettãŒGNU/Linux上ã§å‹•ãソフトウェアã®é–‹ç™ºè€…ã§ã‚ã£ã¦ã‚‚ã€ä¸è‡ªç”±ãªOSã§ã‚ã‚‹MacユーザーãŒå¤šã„ã“ã¨ã«ã¤ã„ã¦è¨˜äº‹ã‚’書ã„ã¦ã„る。 Matthew Garrettã¯ã€ä»Šã‚„開発者ã®ä½œæ¥ç’°å¢ƒã¯ã€ã‚¿ãƒ¼ãƒŸãƒŠãƒ«ã¨Webブラウザーãªã®ã§ã€ä½œæ¥ç’°å¢ƒã¨ã„ã†ç‚¹ã§ã€GNU/LinuxãŒãƒ—ãƒãƒ—ライエタリãªMacã«å¯¾ã—ã¦å分ãªåˆ©ç‚¹ã‚’æä¾›ã§ãã¦ã„ãªã„ã¨ã—ã¦ã„る。 開発ã«ã¯ã€å˜ã«ã‚³ãƒ¼ãƒ‰ã‚’書ã以外ã®ä½œæ¥ã‚‚多ã„。Webブラウザーã§è¤‡æ•°ã®Webサービス間を行ãæ¥ã—ã¦æƒ…å ±ã‚’ã‚³ãƒ”ãƒšã—ãŸã‚Šã™ã‚‹ã®ã¯ã€æ¥µã‚ã¦éžåŠ¹çŽ‡çš„ã§ã‚ã‚‹ã—ã€é–‹ç™ºè€…ã®å¥½ã‚€ä½œæ¥ã§ã¯ãªã„。ã¨ã¯ã„ãˆã€é–‹ç™ºè€…ãŒã‚„らãªã‘ã‚Œã°ãªã‚‰ãªã„作æ¥ã§ã‚ã‚‹ã“ã¨ã«ã¯å¤‰ã‚ã‚Šãªã„。 ã“ã®ãŸã‚ã€ãƒ‡ã‚¹ã‚¯ãƒˆãƒƒãƒ—環境ã«ã€ä¸€èˆ¬çš„ãªé–‹ç™ºãƒ¯ãƒ¼ã‚¯ãƒ•ãƒãƒ¼ã‚’支æ´ã™ã‚‹çµ„ã¿è¾¼ã¿æ©Ÿèƒ½ã‚’増やã™ãªã©ã—ã¦ã€GNU/Linux
Unix Philosophy 㨠Node.jsã®ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã®ä½œã‚Šæ–¹ - from scratch
The Art of UNIX Programming 作者: Eric S.Raymond,長尾高弘出版社/メーカー: アスã‚ー発売日: 2007/06/19メディア: 大型本購入: 4人 クリック: 91回ã“ã®å•†å“ã‚’å«ã‚€ãƒ–ãƒã‚° (62件) を見る TL;DR Unix Philosophyã«ãŠã„ã¦ã¯ã€ã€Œä¸€ã¤ã®ã“ã¨ã‚’ã†ã¾ãã‚„ã‚Šã€å”調ã™ã‚‹ä»•çµ„ã¿ã‚’æŒã¤ã€ã¨ã„ã†äº‹ãŒå¤§äº‹ Node.jsã®ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã«ãŠã„ã¦ã‚‚åŒã˜ã§ã€ã€Œä¸€ã¤ã®ã“ã¨ã‚’ã†ã¾ãã‚„ã‚‹ã€Stream APIã§å”調ã™ã‚‹ã€ã¨è‰¯ã„ 「一ã¤ã®ã“ã¨ã‚’ã†ã¾ãã‚„ã‚‹ã€ã«ã¯ã©ã†ã™ã‚‹ã®ãŒè‰¯ã„ã®ã‹ã€ã¨ã„ã†ã“ã¨ã§ substack ã®ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«å®Ÿè£…例 Simple 㨠Easyã®é•ã„ ã¡ã‚‡ã£ã¨ä»Šå›žé•·ãã¦æ–‡å—ãŒå¤šã„ã®ã§ã€æœ€åˆã¨æœ€å¾Œã«ã¾ã¨ã‚を用æ„ã—ã¾ã—ãŸã€‚時間ãŒãªã„æ–¹ã¯ã“れをèªã‚€ã ã‘ã§ã‚‚ã„ã„ã‹ã¨ã€‚ Unix Philosophy ã•ã¦ã•ã¦ã€Unix Philosoph
Running Processes
I keep suffering a lack of decent process supervision mechanisms provided by operating systems I use. Most systems and software seem to have this idea that a “start up script†is the right approach. This is horribly wrong as is demonstrated by lots and lots and lots of tools that exist to do that on top of so many really awful “ps via cron†kind of things people hack together or process counts via
コマンドライン㧠CSV ã‚’æ•´å½¢ã™ã‚‹ã‚·ãƒ³ãƒ—ルãªæ–¹æ³•ã¯ï¼Ÿ — ã‚ã‚Šãˆã‚‹ãˆã‚Šã‚
Recent entries 宣ä¼ï¼šC/C++ã®ãŸã‚ã®é–‹ç™ºè£œåŠ©ãƒ„ールã€GCCSenseをリリースã—ã¾ã—㟠matsuyama 2010-04-15 宣ä¼ï¼šRubyã®ãŸã‚ã®é–‹ç™ºè£œåŠ©ãƒ„ールã€RSenseをリリースã—ã¾ã—㟠matsuyama 2010-03-21 Emacsã¯æ»ã‚“ã matsuyama 2010-02-22 WebアプリケーションをiPhoneã«å¯¾å¿œã•ã›ã‚‹ãŸã‚ã®æŠ€è¡“メモ matsuyama 2009-10-13 tokyo-emacs#x02ã®å€‹äººçš„レãƒãƒ¼ãƒˆ matsuyama 2009-09-07 Recent comments replica louis vuitton Anonymous User 2010-12-22 Re:テã‚スト入力ä¸ã«è£œå®Œå€™è£œã‚’自動的ã«è¡¨ç¤ºã—ã¦ãれる auto-complete.el をリリースã—ã¾ã—㟠Anonymous User 2010-12
dd ã¨åƒ• - æ°´æ·±1024m
自分ã®ãƒ¡ã‚¤ãƒ³ãƒžã‚·ãƒ³ã“㨠MacBook Pro ã® SSD ã« Ubuntu インストールディスクを dd ã—ã¦ç ´å£Šã—ãŸã€‚ æ£ç›´æ›¸ãã®ã‚‚憚られる話ã§ã€ãŠå‰æ¥å¹´ã‹ã‚‰æœ¬å½“ã«è·æ¥ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã«ãªã‚Œã‚“ã®ã£ã¦è©±ãªã®ã ã‘ã©ã€ 本当ã«ã‚¯ãƒªãƒ†ã‚£ã‚«ãƒ«ãªçŠ¶æ³ä¸‹ã§ã‚„らã‹ã•ãªã„よã†æˆ’ã‚ã¨ã—ã¦ã¾ã¨ã‚ã‚‹ã“ã¨ã«ã—ãŸã€‚ ã³ã£ãã‚Šã™ã‚‹ã»ã©ãƒ¬ãƒ™ãƒ«ã®ä½Žã„話。 修士論文ã®æ出も終ã‚ã‚Šã€ã•ã¦ã‚„ã£ã¨ç ”究室ã®ã‚µãƒ¼ãƒç’°å¢ƒã‚’æ›´æ–°ã§ãã‚‹ãœãã¸ã¸ã€ ã¨ã‹æ€ã„ãªãŒã‚‰ã¨ã‚Šã‚ãˆãšè»¢ãŒã£ã¦ã„㟠HP MicroServer ã« Ubuntu を入れ〠作æ¥ç”¨ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ã«ã—よã†ã¨ã—ã¦ã„ãŸã€‚ 自宅ã§ã‚‚ MicroServer を使ã£ã¦ã„ãŸã®ã§ã•ãã•ãã£ã¨ HDD ã‚’çªã£è¾¼ã¿ã€MicroServer ã«ã¯å…‰å¦ãƒ¡ãƒ‡ã‚£ã‚¢ãƒ‰ãƒ©ã‚¤ãƒ–ãŒãªã„ã®ã§ USB メモリã‹ã‚‰ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã—よã†ã¨ã„ã¤ã‚‚ã®ã‚ˆã†ã«ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã‚¤ãƒ¡ãƒ¼ã‚¸ã‚’ダウンãƒãƒ¼ãƒ‰ã€‚ å…‰å¦ãƒ¡ãƒ‡ã‚£ã‚¢ã®ãªã„マシンã«ã‚¤ãƒ³ã‚¹ãƒˆ
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UNIX/Linuxã®éƒ¨å±‹ FreeBSD・Solaris・Red Hat Linux・Fedora・CentOS・HP-UX を使ã£ãŸä¸Šã§æ°—ã¥ã„ãŸã“ã¨ãƒ»èª¿ã¹ãŸã“ã¨ã‚’ã¾ã¨ã‚ã¾ã—ãŸã€‚ ã“ã® web 内ã«ã¤ã„ã¦ã®å¼•ç”¨ãƒ»ãƒªãƒ³ã‚¯ãƒ»ç´¹ä»‹ãªã©ã®æ³¨æ„点㯠本サイトã¸ã®ãƒªãƒ³ã‚¯ã«ã¤ã„㦠をãŠèªã¿ä¸‹ã•ã„。
Filesystem Hierarchy Standard - Wikipedia
Filesystem Hierarchy Standard（ファイルシステム・ãƒã‚¤ã‚¢ãƒ©ãƒ¼ã‚ー・スタンダードã€FHSã€ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ 階層標準）ã¯ã€Linuxã‚’å«ã‚€Unix系オペレーティングシステム(OS) ã§ã®ä¸»ãªãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã¨ãã®å†…容を定ã‚ãŸã‚‚ã®ã§ã‚る。大部分ã«ãŠã„ã¦ã€BSDç³»ã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªéšŽå±¤ã‚’基ã«ã—ã¦æ‹¡å¼µã—定å¼åŒ–ã—ã¦ã„る。 主è¦ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ãŠã‚ˆã³ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ãƒ™ãƒ³ãƒ€ãƒ¼ã‹ã‚‰ãªã‚‹éžå–¶åˆ©çµ„ç¹”Linux FoundationãŒä¿å®ˆç®¡ç†ã—ã¦ãŠã‚Šã€HPã€ãƒ¬ãƒƒãƒ‰ãƒãƒƒãƒˆã€IBMã€ãƒ‡ãƒ«ã¨ã„ã£ãŸãƒ™ãƒ³ãƒ€ãƒ¼ãŒå‚åŠ ã—ã¦ã„る。 2020å¹´11月)ç¾åœ¨ã®æœ€æ–°ç‰ˆã¯3.0ã§ã€2015å¹´6月3æ—¥ã«ç™ºè¡¨ã•ã‚ŒãŸ[1]。 多ãã®Linuxディストリビューションã¯FHSæº–æ‹ ã‚’æ–¹é‡ã¨ã—ã¦å®£è¨€ã—ã€FHSã«ã—ãŸãŒã£ã¦ã„ã‚‹[2][3][4][5]。 ã‚‚ã¨ã‚‚ã¨ã€UNIXã‚„Unixç³»OSã«ã¯ã€/etcã‚„/binã‚„/usrãªã©ã”ã基本的ãªéƒ¨
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What are good habits for designing command line arguments?
http://www.kfirlavi.com/blog/2012/11/14/defensive-bash-programming/
Init Script Actions
Linux command to disconnect machine
http://howtojboss.com/2012/07/27/know-your-ulimits/
How to get script file path inside script itself when called through sym link
Linux equivalent of the Mac OS X "open" command
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