File handling in Unix: tips, traps and outright badness
Writing Software, technology, sysadmin war stories, and more. I wrote a post over the weekend which said a lot about libraries letting people down, and other people becoming overly dependent on them. There was an aside of sorts in there which mentioned teaching people about all of the things to look out for when you're writing to a file on a Unix-ish/POSIX-ish filesystem situation. A friend reache
PIPEã«ã‚ˆã‚‹ãƒ—ãƒã‚»ã‚¹é–“通信ã¨select, poll, epollã®è©± - c-bata web
エã‚スパートPythonプãƒã‚°ãƒ©ãƒŸãƒ³ã‚° 改訂2版 (アスã‚ードワンゴ) 作者: Michaｌ Jaworski,ï¼´ï½ï½’ｅｋＺｉï½ï½„ï½…,稲田直哉,èŠç”°å°†,渋å·ã‚ˆã—ã,清水å·è²´ä¹‹,森本哲也出版社/メーカー: ドワンゴ発売日: 2018/02/26メディア: Kindle版ã“ã®å•†å“ã‚’å«ã‚€ãƒ–ãƒã‚°ã‚’見る 先日〠tokibito 先生(id:nullpobug)ã¨å‹‰å¼·ã—ã¦ã„ãŸpipe, select, poll, epollã‚ãŸã‚Šã«ã¤ã„ã¦ãƒ¡ãƒ¢ã€‚ os.fork os.fork : åプãƒã‚»ã‚¹(child process)ã‚’ã¤ãれる。 import os a = 0 print(a) os.fork() a += 1 print(a) åã¯è¦ªã®è¤‡è£½ã€‚親ã®ãƒ‡ãƒ¼ã‚¿ã€ãƒ’ープã€ã‚¹ã‚¿ãƒƒã‚¯ã®å„空間ã®è¤‡è£½ã‚’å–得。 メモリã®ã“れらã®éƒ¨åˆ†ã¯å…±æœ‰ã•ã‚Œãªã„ã®ã§ã€å®Ÿè¡Œçµæžœã¯æ¬¡ã®ã‚ˆã†ã«ãªã‚‹(テã‚ストセグメントã¯å…±æœ‰ã•ã‚Œã‚‹)。
Default Parallels Plesk Panel Page
This page is generated by Parallels Plesk Panel, the leading hosting automation software. You see this page because there is no Web site at this address. You can do the following: Create domains and set up Web hosting using Parallels Plesk Panel. Parallels is a worldwide leader in virtualization and automation software that optimizes computing for consumers, businesses, and Cloud services provider
Event Messages and Status Words
from Alice's Adventures in Wonderland, Lewis Carroll Caterpillar knows all the error codes, which is more than most of us do. Last update: 26-Jul-2015 06:26 UTC Related Links Table of Contents Introduction System Status Word Peer Status Word Clock Status Word Flash Status Word Kiss Codes Crypto Messages Introduction This page lists the status words, event messages and error codes used for ntpd rep
Emacsã¯æ»ã‚“ã - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article? Emacs（イーマックス）ã¨ã¯é«˜æ©Ÿèƒ½ã§ã‚«ã‚¹ã‚¿ãƒžã‚¤ã‚ºæ€§ã®é«˜ã„テã‚ストエディタã§ã‚る。スクリーン・エディタã¨ã—ã¦ã®äººæ°—ãŒé«˜ãã€ç‰¹ã«UNIXã®ãƒ—ãƒã‚°ãƒ©ãƒžã‚’ä¸å¿ƒã¨ã—ãŸã‚³ãƒ³ãƒ”ュータ技術者ã«æ„›ç”¨è€…ãŒå¤šã„。(⇒ http://ja.wikipedia.org/wiki/Emacs) 「Emacsã¯æ»ã‚“ã ã€å…ƒè¨˜äº‹â‡’ http://cx4a.org/pub/emacs-is-dead.ja.html ç†è€…ã®æ¾å±±æœ‹æ´‹ã•ã‚“㯠auto-complete.el ã®ä½œè€…ã§ã™ã€‚é¢ç™½ã„記事ã§ã™ã®ã§æ˜¯éžã”一èªã‚’ï¼ æ–‡æ›¸ã®ãƒ©ã‚¤ã‚»ãƒ³ã‚¹ ã“ã®æ–‡æ›¸ã¯Creative Comm
grepã§è¤‡æ•°é …目除外 - 技術メモ帳
テã‚ストファイルã‹ã‚‰ã€è¤‡æ•°ã®é …目を除外ã•ã›ãŸã„ã¨ã〠普通ã¯ã€ä»¥ä¸‹ã®ã‚ˆã†ã«äºŒã¤ã®grepを使用ã—ã¦è¡Œã†ã¯ãšã€‚。 cat text.txt | grep -v 'user' | grep -v 'root' 一ã¤ã®grepã§è¡Œã†äº‹ãŒå‡ºæ¥ã‚‹ã€‚ cat text.txt | grep -v -e 'user' -e 'root' å˜ç´”ã«ã€æ£è¦è¡¨ç¾ã§ã‚„ã£ãŸæ–¹ãŒã‚ˆã•ãã†ã€‚。 cat text.txt | egrep -v 'user|root'
GNU Make 4.0ã«GNU GuileãŒçµ„ã¿è¾¼ã¾ã‚ŒãŸ
GNU Make 4.0 released GNU Make 4.0ãŒãƒªãƒªãƒ¼ã‚¹ã•ã‚ŒãŸã€‚ 今回ã®ãƒªãƒªãƒ¼ã‚¹ã§ã¯ã€GNU Makeã¯Schemeã®å®Ÿè£…ã§ã‚ã‚‹GNU Guileを組ã¿è¾¼ã‚“ã 。ã“ã‚Œã«ã‚ˆã‚Šã€Makefileã®ä¸ã§SchemeãŒæ›¸ã‘るよã†ã«ãªã‚‹ã€‚ ãã®æ©Ÿèƒ½ã¯ã€GNU Make Manualã®Guile Functionã®é …ç›®ã§èª¬æ˜Žã•ã‚Œã¦ã„る。ã¾ã ã€ã‚ªãƒ³ãƒ©ã‚¤ãƒ³ç‰ˆã®GNU Make ManualãŒ2010å¹´ã‹ã‚‰æ›´æ–°ã•ã‚Œã¦ã„ãªã„ã®ã§ã€ã‚³ãƒŸãƒƒãƒˆæ™‚ã®ãƒ‰ã‚ュメントã®å·®åˆ†ã®ãƒªãƒ³ã‚¯ã™ã‚‹ã€‚ 8.13 The `guile' Function 具体的ãªçµ„ã¿è¾¼ã¿æ–¹æ³•ã¨ã—ã¦ã¯ã€makeå´ã«guileã¨ã„ã†é–¢æ•°ãŒè¿½åŠ ã•ã‚Œã€ã“ã®å¼•æ•°ã«æ–‡å—列を与ãˆã‚‹ã¨ã€Schemeã¨ã—ã¦Guileã§å‡¦ç†ã•ã‚Œã‚‹ã‚ˆã†ã«ãªã‚‹ã€‚ãŠãらãã€ã“ã®ã‚ˆã†ã«ã€‚ Hello.o : $(guile (string-append "hello" ".c"
Jenkinsã§cron実行管ç†ã‚’ã‚„ã£ã¦ã¿ãŸã€‚ - oranie's blog
ã¨ã‚Šã‚ãˆãšè©¦ã—ãŸã®ã§ã€å®Ÿéš›ã®å†…容ã¨ã‹ã¯ã“ã¡ã‚‰ã®å‚考ã«ã—ãŸãƒ–ãƒã‚° 「Jenkinsã§å®šæœŸå®Ÿè¡Œã™ã‚‹Jobを管ç†ã—ãŸã»ã†ãŒè‰¯ã„３ã¤ã®ç†ç”±ã€ ã‚’å‚ç…§ã—ãŸæ–¹ãŒè‰¯ã„ã¨æ€ã„ã¾ã™ã€‚以下ã¯è©¦ã—ãŸå†…容ã«ç”»åƒã¤ã‘ãŸãらã„ã§ã™ã€‚ ã“ã‚“ãªæ„Ÿã˜ã®ã‚¹ã‚¯ãƒªãƒ—トを管ç†ã—ã¦ã¿ã‚‹ã€‚ Jenklinsã®ç’°å¢ƒæ§‹ç¯‰ã¯å‰²æ„›ã—ã¾ã™ã€‚ 「Jenkinsã§å®šæœŸå®Ÿè¡Œã™ã‚‹Jobを管ç†ã—ãŸã»ã†ãŒè‰¯ã„３ã¤ã®ç†ç”±ã€ ã»ã‚“ã¨ä¸Šè¨˜ã®ãƒ–ãƒã‚°ã®ã¾ã¾ã§ã™ã€‚ # cat /tmp/web_gen.sh #!/bin/bash num=`expr $RANDOM % 100` ab -c 1 -n $num http://www.oranie.org/上記ã®é©å½“ãªã‚¹ã‚¯ãƒªãƒ—トを/tmp/ã«ç½®ã„ã¦cron実行ã—ã¦ç®¡ç†ã—ã¦ã¿ã¾ã™ã€‚ ã¾ãšã“ã‚“ãªæ„Ÿã˜ã§ä»¥ä¸‹ã®æ§˜ãªè¨å®šã‚’ã—ã¦ã¿ã¾ã™ã€‚ 失敗ã™ã‚‹ã¨ã“ã‚“ãªæ„Ÿã˜ã€‚ å±¥æ´ã¯ã“ã‚“ãªæ„Ÿã˜ã§è¦‹ã‚Œã‚‹ã€‚ ãƒã‚°ã‚‚「コンソール出力ã€ã§é–²è¦§ã§ãる。 ã§
ackを使ãŠã†! - tototoshi ã®æ—¥è¨˜
ã¿ãªã•ã‚“grepã—ã¦ã¾ã™ã‹!? 便利ã§ã™ã‚ˆãgrep。自分ã¯Linuxを触りã¯ã˜ã‚ãŸã“ã‚〠grepを使ã„ã“ãªã›ã‚‹ã‚ˆã†ã«ãªã‚Œã°ä¸€äººå‰ã ã£ã¦è¨€ã‚ã‚Œã¦ã€ãªã«ã„ã£ã¦ã‚“ã®ã“ã®äººãã‚‚ã„ã¨ã‹æ€ã£ã¦ãªã„ã§ã™ã‚ˆå…¨ç„¶ã€‚ ã¾ã‚今ã¨ãªã£ã¦ã¯grepã‚’ãã‚Œãªã‚Šã«ä½¿ã„ã“ã‚“ã§ã‚‹ã‚ã‘ã§ã™ã‚ˆã€‚ $ find . -name "*hoge" -type -f | grep -v '\.svn' | xargs grep piyopiyo ã¨ã‹ã‚„ã£ã¦ã。 ãªã‚“ã‹find|xargs|grepã¨ã‹ã¾ã•ã«UNIXçš„ã§ã™ã‚ˆãã€‚ç´ æ•µã‚„ã‚“ã€‚ ç°¡å˜ãªã‚³ãƒžãƒ³ãƒ‰ã‚’組ã¿åˆã‚ã›ã¦ã§ã£ã‹ã„ã“ã¨ã‚„ã£ã¡ã‚ƒã†ï¼Ÿï¼Ÿã¿ãŸã„ãªï¼Ÿï¼Ÿ ã‚ã‚“ã©ãã›ãƒ¼ã‚ˆã£!!! ã£ã¦ã“ã¨ã§ã€ackを使ã„ã¾ã—ょã†ã€‚ ack昨日知りã¾ã—ãŸã€‚ ã§ã€ä»Šæ—¥ã€ä½¿ã„ã¯ã˜ã‚ã¦2日目。 ã¨ã‚Šã‚ãˆãšã€å…¬å¼(Beyond grep: ack 2.12, a source code search too
xargs -P ãŒæ¿€ã—ã便利ãªã®ã§ãƒ¡ãƒ¢ - ãŠã¨ã‚‚ã ã¡ãƒ†ã‚£ãƒ¼ã‚¿ã‚¤ãƒ
xargs ã® -P オプションを使ã†ã¨ãƒ—ãƒã‚»ã‚¹ã‚’複数起動ã—ã¦å‡¦ç†ã‚’並列ã«è¡Œãªã†ã“ã¨ãŒå‡ºæ¥ã‚‹ã€‚ 例 例ãˆã°ã€ 1 万枚㮠JPEG ç”»åƒã‚’全㦠800x800 ã«åŽã¾ã‚‹ã‚ˆã†ã«åŠ¹çŽ‡è‰¯ãリサイズã—ãŸã„。 ã¾ãšç§ã¯ã“ã®ã‚ˆã†ãªã‚³ãƒžãƒ³ãƒ‰ã‚’考ãˆãŸã€‚ convert --geometry 800x800 *.jpg ã—ã‹ã— zsh ã«æ€’られãŸã€‚ zsh: argument list too long: convert 引数ãŒå…¨ã¦å±•é–‹ã•ã‚Œã‚‹ãŸã‚ã“ã®ã‚ˆã†ãªäº‹ãŒèµ·ãる。 ç§ã¯ xargs を使ã£ã¦å‡¦ç†ã™ã‚‹ã“ã¨ã‚’æ€ã„付ã„ãŸã€‚ ls | xargs -I{} convert --geometry 800x800 {} c_{} 処ç†ã¯è¡Œãªã‚れるãŒéžå¸¸ã«é…ã„。 ã—ã‹ã‚‚ CPU ã‚’å…¨ã使ã£ã¦ã„ãªã„ã“ã¨ãŒåˆ†ã‹ã‚Šã€ç§ã¯å‡¦ç†ã‚’並列的ã«è¡Œãªã†äº‹ã‚’考ãˆãŸã€‚ ãã“㧠xargs ã® -P オプションã®å‡ºç•ªã§ã‚る。 P ã®å¾Œã«ä¸¦åˆ—
ＵＮＩＸユーザーã®ãŸã‚ã®ã‚³ãƒŸã‚±ãƒƒãƒˆ82æƒ…å ±ãƒšãƒ¼ã‚¸
※ã“ã®ãƒªã‚¹ãƒˆã¯LSSã®èª¿æŸ»åŠã³çš†æ§˜ã‹ã‚‰ã®æƒ…å ±ã‚’å…ƒã«ä½œæˆã„ãŸã—ã¾ã—ãŸã€‚ ã”æ„見ã”指摘・タレコミ㯠[email protected]ã¾ã§ã€‚
Beyond grep: ack 2.12, a source code search tool for programmers
ack is a grep-like source code search tool. The latest version of ack is v3.9.0, released 2025-05-26. Changelog for v3.9.0 Designed for programmers with large heterogeneous trees of source code, ack is written in portable Perl 5 and takes advantage of the power of Perl's regular expressions. What's new in ack? New boolean options --and, --or and --not The new repeatable --and, --or and --not optio
if 文㨠test コマンド | UNIX & Linux コマンド・シェルスクリプト リファレンス
if 文㨠test コマンド if æ–‡ã¨ã¯ï¼Ÿ if æ–‡ã¨ã¯ã€ä¸Žãˆã‚‰ã‚ŒãŸæ¡ä»¶å¼ãŒçœŸã®ã¨ãã®ã¿å‡¦ç†ã‚’è¡Œã„ã€ãれ以外ã®å ´åˆã¯å‡¦ç†ã‚’スã‚ップã™ã‚‹ã€ãªã©ã¨ã„ã£ãŸå ´åˆã«ä½¿ç”¨ã•ã‚Œã‚‹æ¡ä»¶åˆ†å²å‡¦ç†ã§ã‚る。 æ¡ä»¶å¼ã«ã¯ä¸€èˆ¬çš„ã« test コマンドを用ã„ã‚‹ãŒã€ls コマンドや grep コマンドç‰ã®ä»–ã®ã‚³ãƒžãƒ³ãƒ‰ã‚’用ã„ã¦ã‚‚構ã‚ãªã„。 if æ–‡ã¯æ¡ä»¶å¼ã«æŒ‡å®šã•ã‚ŒãŸã‚³ãƒžãƒ³ãƒ‰ã®çµ‚了ステータスを判定ã—分å²ã‚’è¡Œã†ã€‚終了ステータスãŒã€Œ0ã€ã®å ´åˆã¯çœŸã€ãã®ä»–ã®å ´åˆã¯å½ã¨ãªã‚‹ã€‚ if æ–‡ タイプ 1
Working With Unix Processes — Learn the Fundamentals of Unix Programming in Ruby
You're a web developer. A good one. You write Rails apps in your sleep. But you skipped over some fundamentals. You feel like your foundation is lacking. This book will fill that gap. "I just finished reading the book and loved it! That made me realize how simple and powerful unix programming is and how very little I really knew about it. It will definitely help me design the next version of Thin.
unix ジャンル別コマンド一覧
最終更新 2023-09-09 UNIX/Linux コマンド解説ã®ä¸€è¦§ã§ã™ã€‚ 2023/09/09ç¾åœ¨ã®æŽ²è¼‰ã‚³ãƒžãƒ³ãƒ‰æ•°ã¯528個ã§ã™ã€‚ 主㫠FreeBSD, Redhat Enterprise Linux, CentOS, Ubuntu, Amazon Linux ç‰ã§ä½¿ç”¨ã§ãるコマンドを集ã‚ãŸã‚‚ã®ã§ã™ã€‚ 括弧内ã®æ•°å—ã¯ã€ã‚¸ãƒ£ãƒ³ãƒ«ã«å±žã™ã‚‹ã‚³ãƒžãƒ³ãƒ‰ã®å€‹æ•°ã§ã™ã€‚
New community features for Google Chat and an update on Currents
Join the official community for Google Workspace administrators In the Google Cloud Community, connect with Googlers and other Google Workspace admins like yourself. Participate in product discussions, check out the Community Articles, and learn tips and tricks that will make your work and life easier. Be the first to know what's happening with Google Workspace. ______________ Learn about more Goo
Linux上ã§ã‚·ã‚§ãƒ«ãŒå®Ÿè¡Œã•ã‚Œã‚‹ä»•çµ„ã¿ã‚’，体系的ã«ç†è§£ã—よã†ã€€ï¼ˆbash ä¸ç´šè€…ã¸ã®é“） - 主ã«è¨€èªžã¨ã‚·ã‚¹ãƒ†ãƒ 開発ã«é–¢ã—ã¦
ãƒãƒƒãƒã®ã¾ã¨ã‚TOP㸠bash åˆç´šè€…ã¯ï¼Œç°¡å˜ãªã‚³ãƒžãƒ³ãƒ‰ãŒä¸¦ã‚“ã ã ã‘ã®å°ã•ãªã‚¹ã‚¯ãƒªãƒ—トを書ãã“ã¨ãŒã§ãる。 ã—ã‹ã—シェルã®å‹•ä½œåŽŸç†ã‚’よãç†è§£ã—ã¦ãŠã‚‰ãšï¼Œ 一æ©é€²ã‚“ã ã“ã¨ã‚’ã‚„ã‚ã†ã¨ã™ã‚‹ã¨ã¤ã¾ãšã。 シェルスクリプトã®ä¸ç´šè€…ã«ãªã‚‹ãŸã‚ã«ã¯ï¼Œ Linux上ã§ã‚·ã‚§ãƒ«ãŒå‹•ä½œã™ã‚‹ä»•çµ„ã¿ã‚’体系的ã«ç†è§£ã—ã¦ãŠãå¿…è¦ãŒã‚る。 （１） シェルã¨ã‚³ãƒžãƒ³ãƒ‰ã«ã¤ã„㦠（１−１） シェルã¨ã¯ï¼ŒOSã«å‘½ä»¤ã‚’出ã™ãŸã‚ã«ï¼ŒOSを包んã§ã„る外膜ã§ã‚る。 （１−２） Linuxãƒã‚°ã‚¤ãƒ³æ™‚ã«ã¯ï¼Œãã®ãƒ¦ãƒ¼ã‚¶ç”¨ã®ãƒã‚°ã‚¤ãƒ³ã‚·ã‚§ãƒ«ãŒèµ·å‹•ã™ã‚‹ã€‚ （１−３） ユーザãŒæ‰“ã¡è¾¼ã‚“ã コマンドã¯ï¼Œå®Ÿè¡Œå‰ã«ï¼Œbashã«ã‚ˆã£ã¦æ•´å½¢ã•ã‚Œã‚‹ã€‚ （１−４） コマンドã®å…ˆé ã®æ–‡å—列ã¯ï¼Œå®Ÿè¡Œå¯èƒ½ãƒ•ã‚¡ã‚¤ãƒ«ã‹ï¼Œã¾ãŸã¯bashã®çµ„ã¿è¾¼ã¿ã‚³ãƒžãƒ³ãƒ‰ã§ã‚る。 （２） コマンド間ã®é€£æºã«ã¤ã„㦠（２−１） コマンド呼ã³å‡ºã—ã¨ã¯ï¼Œã‚µãƒ–プãƒã‚»ã‚¹ã®ç”Ÿæˆã§ã‚る。 （２−２） 親プãƒ
ランã‚ング
ランã‚ング
メンテナンス
リリースã€éšœå®³æƒ…å ±ãªã©ã®ã‚µãƒ¼ãƒ“スã®ãŠçŸ¥ã‚‰ã›
最新ã®äººæ°—エントリーã®é…ä¿¡
j次ã®ãƒ–ックマーク
kå‰ã®ãƒ–ックマーク
lã‚ã¨ã§èªã‚€
eコメント一覧を開ã
oページを開ã
http://linux.just4fun.biz/%E9%80%86%E5%BC%95%E3%81%8DUNIX%E3%82%B3%E3%83%9E%E3%83%B3%E3%83%89/bc%E3%82%B3%E3%83%9E%E3%83%B3%E3%83%89%E3%81%A716%E9%80%B2%E6%95%B0%E3%80%8110%E9%80%B2%E6%95%B0%E3%80%818%E9%80%B2%E6%95%B0%E3%80%812%E9%80%B2%E6%95%B0%E3%81%AE
Can terminals detect <Shift-Enter> or <Control-Enter>?
Mongod start with memory limit
{{#tags}}- {{label}}
{{/tags}}