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cron ã§ã†ã”ã‹ã—ã¦ã„るコマンドをタイムアウトã•ã›ã‚‹ - tokuhirom's blog
cron ã§ã†ã”ã‹ã—ã¦ã„るコマンドをタイムアウトã•ã›ã‚‹ coreutils ã® timeout(1) ã‚’ã¤ã‹ãˆã° OK ã§ã™ã€‚ http://www.gnu.org/software/coreutils/manual/html_node/timeout-invocation.html softlimit -t 60 foobar ã¨ã„ã†æ‰‹ã‚‚ã‚ã‚‹ã‘ã©ã€CPU時間ã ã‹ã‚‰ sleep ã—ã¦ã‚‹ã¨ã‹ã ã¨æ»ããªã„ã¨ã„ã†èª¬ã‚‚ã‚るよã†ã§ã™ã€‚ Published: 2012-12-19(Wed) 03:57
GNU Coreutils Cheat Sheet
A long, long time ago when I was mastering Linux I created three cheat sheets about GNU fileutils, GNU shellutils and GNU textutils. I kept keep them in front of me at all times and I quickly memorized which commands did what. A few days ago I remembered about them and decided to publish them on my blog but it turned out fileutils, shellutils and textutils had been merged in GNU coreutils in 2003;
Linuxã®ãƒ¡ãƒ¢ãƒªä¸Šã®ã‚ャッシュを解放ã™ã‚‹ - å…ƒRX-7ä¹—ã‚Šã®é©å½“ãªæ—¥ã€…
ã„ã¤ã‚‚æ€ã„ã ã™ã®ã«æ™‚é–“ãŒã‹ã‹ã‚‹ã¨ã„ã†ã‹ã€ã‚°ã‚°ã‚‹ã®ã§ãƒ¡ãƒ¢ã€‚ 例ãˆã°ã€ãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯ã¨ã‹ã‚’ã¨ã£ã¦ã„ã¦ã€æ®‹ã£ãŸã‚ャッシュを奇麗ã•ã£ã±ã‚Šã«æ¶ˆã—ãŸã„時ã¨ã‹ã«ä½¿ã†ã€‚ Linuxã®ãƒ¡ãƒ¢ãƒªã§ä¿æŒã—ã¦ã„ã‚‹ã‚ャッシュをクリアã™ã‚‹ã«ã¯ã€ä»¥ä¸‹ã‚’実行ã™ã‚‹ã€‚ # sync # echo 3 > /proc/sys/vm/drop_caches 値ã®æ„味ã¨ã—ã¦ã¯ã€ã€ã€ 1： ページã‚ャッシュを解放 2： dentryã€inode を解放 3： ページã‚ャッシュã€dentryã€inode を解放 以下をå‚考ã«ã€‚ /proc/sys/vm/drop_caches (Linux 2.6.16 以é™) ã“ã®ãƒ•ã‚¡ã‚¤ãƒ«ã«æ›¸ãè¾¼ã¿ã‚’è¡Œã†ã“ã¨ã§ã€ã‚¯ãƒªãƒ¼ãƒ³ãªã‚ャッシュã€dentry〠inode をメモリ上ã‹ã‚‰å¤–ã—ã€ãã®ãƒ¡ãƒ¢ãƒªã‚’解放ã™ã‚‹ã€‚ ページã‚ャッシュを解放ã™ã‚‹ã«ã¯ã€ echo 1 > /proc/sys/vm/drop_caches
Hoytech
vmtouch - the Virtual Memory Toucher Portable file system cache diagnostics and control Download from github Read the online manual vmtouch is a tool for learning about and controlling the file system cache of unix and unix-like systems. It is BSD licensed so you can basically do whatever you want with it. Quick install guide: $ git clone https://github.com/hoytech/vmtouch.git $ cd vmtouch $ make
Mosh: the mobile shell
(mobile shell) Remote terminal application that allows roaming, supports intermittent connectivity, and provides intelligent local echo and line editing of user keystrokes. Mosh is a replacement for interactive SSH terminals. It's more robust and responsive, especially over Wi-Fi, cellular, and long-distance links. Mosh is free software, available for GNU/Linux, BSD, macOS, Solaris, Android, Chrom
dstatã®ä¸‡èƒ½æ„ŸãŒãƒãƒ³ãƒ‘ãªã„ - （ã²ï¼‰ãƒ¡ãƒ¢
サーãƒãƒ¼ã®ãƒªã‚½ãƒ¼ã‚¹ã‚’見るã«ã¯ã‚°ãƒ©ãƒ•åŒ–ã¯é‡è¦ã§ã™ãŒã€æŽ¨ç§»ã§ã¯ãªãリアルタイムãªçŠ¶æ³ã€ä¾‹ãˆã°ç§’å˜ä½ã®ã‚¹ãƒ‘イã‚ーãªè² è·ã‚’見るã«ã¯ã€ã‚µãƒ¼ãƒãƒ¼ä¸Šã§vmstatã‚„iostatãªã©ã®*statファミリーをå©ãå¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ ã•ã¦ã€vmstatã¯ãƒ¡ãƒ¢ãƒªã®çŠ¶æ³ã‚„ブãƒãƒƒã‚¯æ•°å˜ä½ã®I/O状æ³ã¯è¦‹ã‚‰ã‚Œã¾ã™ãŒã€ãƒã‚¤ãƒˆå˜ä½ã®I/O状æ³ã‚„ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã®é€ä¿¡ã€å—ä¿¡ãƒã‚¤ãƒˆæ•°ã‚’見るã“ã¨ã¯ã§ãã¾ã›ã‚“。 # vmstat 1 procs -----------memory---------- ---swap--- -----io----- --system-- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st 3 1 0 4724956 355452 726532 0 0 54 484 3 3 1 0 99 0 0 2 0 0 47
LIRC - Linux Infrared Remote Control
What is LIRC ? LIRC is a package that allows you to decode and send infra-red signals of many (but not all) commonly used remote controls. Recent linux kernels makes it possible to use some IR remote controls as regular input devices. Sometimes this makes LIRC redundant. However, LIRC offers more flexibility and functionality and is still the right tool in a lot of scenarios. The most important pa
Voyage MPD | Voyage Linux
Voyage MPD is a special edition of Voyage Linux that makes embedded hardware (e.g. ATOM, ALIX) become your favourite digital music player and Computer-Audio-Source (CAS) system. Latest versions: voyage-mpd-0.10.0.tar.bz2 [2015-05-01] [Live CD] Snapshot Build: voyage-mpd-current.tar.bz2 [Live CD] Older versions: voyage-mpd-0.9.5.tar.bz2 [2014-11-11] [Live CD] voyage-mpd-0.9.2.tar.bz2 [2013-12-20] [
ã¤ã„最近知ã£ãŸcrontabã®ãƒžã‚¯ãƒ - harry’s memorandum
cronã®èªžæºãŒã‚®ãƒªã‚·ãƒ£ç¥žè©±ã®æ™‚é–“ã®ç¥žã‚¯ãƒãƒŽã‚¹(chronos/kronos)ã ã£ãŸã¨ã¯ãƒžã‚¸ã«çŸ¥ã‚‰ãªã‹ã£ãŸã€‚ 語æºã¯åˆ¥ã«ã—ã¦crontabマクãƒã¨ã„ã†ã®ãŒã‚ã‚‹ã‚“ã§ã™ã。ã“ã‚“ãªæ„Ÿã˜ã«@rebootã¨ã™ã‚‹ã¨OS起動時㫠test.pl を実行ã—ã¦ãれる。/etc/rc.localã«æ›¸ã„ã¦ãŠãよã†ãªã‚‚ã®ã§ã™ã。 $ crontab -l @reboot /home/user/test.pl http://en.wikipedia.org/wiki/Cron#Predefined_scheduling_definitions Entry Description Equivalent To @yearly (or @annually) Run once a year 0 0 1 1 * @monthly Run once a month 0 0 1 * * @weekly Run once a we
ãƒãƒœãƒƒãƒˆã®è‚²ã¦æ–¹:ã€Tips】ジョブã®ç®¡ç†ï¼ˆnohup, disown, 一時åœæ¢ãƒ»å†é–‹ï¼‰ã€Linux】 - livedoor Blog（ブãƒã‚°ï¼‰
linux(bash)ã§ãƒã‚°ã‚¢ã‚¦ãƒˆã—ã¦ã‚‚ジョブをåœæ¢ã—ãŸããªã„ã¨ã． $ nohup ./program nohupã—忘れã¦é€”ä¸ã‹ã‚‰nohupã—ãŸã„ã¨ã， （ジョブ番å·ã‚’1ã¨ã™ã‚‹ï¼‰ $ disown %1ã“ã‚Œã§ï¼Œshellã®ã‚¸ãƒ§ãƒ–管ç†ã‹ã‚‰åˆ‡ã‚Šé›¢ã•ã‚Œã‚‹ã®ã§ ãƒã‚°ã‚¢ã‚¦ãƒˆã—ã¦ã‚‚ジョブã¯å®Ÿè¡Œã•ã‚Œç¶šã‘る． ã“ã®æ™‚，コマンドをbgã§ãƒãƒƒã‚¯ã‚°ãƒ©ã‚¦ãƒ³ãƒ‰ã‚¸ãƒ§ãƒ–ã«ã—ã¦ãŠã‹ãªã„㨠åœæ¢ã—ãŸã¾ã¾ï¼Œshellã®ç®¡ç†ã‚’離れã¦ã—ã¾ã†ï¼Ž ãã“ã§killコマンドã§ãƒ—ãƒã‚»ã‚¹ã«CONTシグナルをé€ã‚‹ã¨å†é–‹ã™ã‚‹ï¼Ž $ kill -CONT pid逆ã«ç›´æŽ¥ç®¡ç†ä¸‹ã«ãªã„プãƒã‚»ã‚¹ã‚’一時åœæ¢ã—ãŸã„ã¨ã． $ kill -STOP pidkillコマンドã¯å—é¢ã‹ã‚‰ãƒ—ãƒã‚»ã‚¹ã‚’殺ã™ã“ã¨ãŒç›®çš„ã‹ ã¨ã„ã†ã¨ãã†ã§ã‚‚ãªã， シグナルをé€ã‚‹ã®ãŒãŠä»•äº‹ã ã£ãŸã‚Šã™ã‚‹ï¼Ž å‚考 Manpage of BASH Manpage of KILL
Linus Torvalds in Pictures - Linux.com
Celebrating 20 years of Linux with a look back at the creator, Linus Torvalds, in pictures. We hope you will join The Linux Foundation and Linus at LinuxCon in August in Vancouver, B.C. To see all 14 pictures, check out the this special Linus Torvalds in Pictures slideshow. For more information about attending LinuxCon and the 20th Anniversary of Linux LinuxCon Gala, visit the LinuxCon website.
Things you (probably) didn't know about xargs
Things you (probably) didn’t know about xargs 26 June 2011 - Bangalore, India If you’ve spent any amount of time at a Unix command line you’ve probably already seen xargs. In case you haven’t, xargs is a command used to execute commands based on arguments from standard input. Common use cases I often see xargs used in combination with find in order to do something with the list of files returned b
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ã¯ã¦ãªã‚°ãƒ«ãƒ¼ãƒ—ã®çµ‚了日を2020å¹´1月31æ—¥(金)ã«æ±ºå®šã—ã¾ã—㟠以下ã®ã‚¨ãƒ³ãƒˆãƒªã®é€šã‚Šã€ä»Šå¹´æœ«ã‚’目処ã«ã¯ã¦ãªã‚°ãƒ«ãƒ¼ãƒ—を終了予定ã§ã‚る旨をãŠçŸ¥ã‚‰ã›ã—ã¦ãŠã‚Šã¾ã—ãŸã€‚ 2019年末を目処ã«ã€ã¯ã¦ãªã‚°ãƒ«ãƒ¼ãƒ—ã®æ供を終了ã™ã‚‹äºˆå®šã§ã™ - ã¯ã¦ãªã‚°ãƒ«ãƒ¼ãƒ—日記 ã“ã®ãŸã³ã€æ£å¼ã«çµ‚了日を決定ã„ãŸã—ã¾ã—ãŸã®ã§ã€ä»¥ä¸‹ã®é€šã‚Šã”確èªãã ã•ã„。 終了日: 2020å¹´1月31æ—¥(金) エクスãƒãƒ¼ãƒˆå¸Œæœ›ç”³è«‹æœŸé™:2020å¹´1月31æ—¥(金) 終了日以é™ã¯ã€ã¯ã¦ãªã‚°ãƒ«ãƒ¼ãƒ—ã®é–²è¦§ãŠã‚ˆã³æŠ•ç¨¿ã¯è¡Œãˆã¾ã›ã‚“。日記ã®ã‚¨ã‚¯ã‚¹ãƒãƒ¼ãƒˆãŒå¿…è¦ãªæ–¹ã¯ä»¥ä¸‹ã®è¨˜äº‹ã«ã—ãŸãŒã£ã¦æ‰‹ç¶šãã‚’ã—ã¦ãã ã•ã„。 ã¯ã¦ãªã‚°ãƒ«ãƒ¼ãƒ—ã«æŠ•ç¨¿ã•ã‚ŒãŸæ—¥è¨˜ãƒ‡ãƒ¼ã‚¿ã®ã‚¨ã‚¯ã‚¹ãƒãƒ¼ãƒˆã«ã¤ã„㦠- ã¯ã¦ãªã‚°ãƒ«ãƒ¼ãƒ—日記 ã”利用ã®ã¿ãªã•ã¾ã«ã¯ã”迷惑をãŠã‹ã‘ã„ãŸã—ã¾ã™ãŒã€ã©ã†ãžã‚ˆã‚ã—ããŠé¡˜ã„ã„ãŸã—ã¾ã™ã€‚ 2020-06-25 追記 ã¯ã¦ãªã‚°ãƒ«ãƒ¼ãƒ—日記ã®ã‚¨ã‚¯ã‚¹ãƒãƒ¼ãƒˆãƒ‡ãƒ¼ã‚¿ã¯2020å¹´2月28
JSLinux - Technical Notes
History This emulator has a long history. The current version is based on TinyEMU and compiled to Javascript or WASM with emscripten. In 2011 I wrote the initial version of JSLinux, the first PC/x86 emulator in Javascript running Linux. I reused parts of another of my emulators (QEMU) for the x86 helpers and the devices. After some time (2015), I modified it to use the asm.js Javascript subset so
GNU Parallel - Summary [Savannah]
This software is part of the GNU Project. NAME parallel - build and execute shell command lines from standard input in parallel DESCRIPTION GNU parallel is a shell tool for executing jobs concurrently locally or using remote computers. A job is typically a single command or a small script that has to be run for each of the lines in the input. The typical input is a list of files, a list of hosts,
ã•ãらã®VPSã§ãƒ•ã‚¡ã‚¤ã‚¢ãƒ¼ã‚¦ã‚©ãƒ¼ãƒ«ãŒä½•ã‚‚è¨å®šã•ã‚Œã¦ã„ãªã„ã®ã«é©šæ„•ã—ãŸãŒ ufw ã§è§£æ±º - babie, you're my home
ã•ãらã®VPS ã£ã¦ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã§ã¯ãƒ•ã‚¡ã‚¤ã‚¢ãƒ¼ã‚¦ã‚©ãƒ¼ãƒ«ã®è¨å®šä½•ã‚‚ã•ã‚Œã¦ãªã„ã¨ã„ã†è¨˜äº‹ã‚’ã¿ã¦é©šæ„•ã—ãŸã€‚ã¨ã€ã‚ˆã考ãˆãŸã‚‰ Ubuntu 10.04 LTS ã‚’å†ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã—ãŸã‹ã‚‰ã€ã©ã£ã¡ã«ã—ã¦ã‚‚åˆæœŸçŠ¶æ…‹ã ãªã€‚ ã¨ã‚Šã‚ãˆãšç¢ºã‹ã‚ãŸã€‚ $ sudo iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination オウフã€ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã¯ç©ºãªã®ã‹â€¦â€¦ iptables ã®è¨å®šã‚ã‚“ã©ãã›ã‡ãªãƒ¼ã©ã†ã—よã†ã‹ãªãƒ¼ã€ã¨æ€ã£ã¦ã„ãŸã‚‰ã€ã©ã†ã‚‚ Ubuntu ã§ã¯ ufw ã¨ã„ã†
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networking:netem [Wiki]
Performance Tweaks and Tools For Linux | PDF | Transmission Control Protocol | Device Driver
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