[B! linux] yu4uã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

yu4u id:yu4u

linuxã«é–¢ã™ã‚‹yu4uã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (22)

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

${{author_name}}$
{{author_name}}{{created}}
{{ #comment }}{{ comment }}{{ /comment }}
- {{ label }}

${{author_name}}$

{{{comment_expanded}}}

{{label}}

{{#is_bookmark}}ãƒªã‚¹ãƒˆ{{/is_bookmark}}{{^is_bookmark}}ãƒªãƒ³ã‚¯{{/is_bookmark}}

Linuxã®I/Oã‚„CPUã®è² è·ã¨ãƒãƒ¼ãƒ‰ã‚¢ãƒ™ãƒ¬ãƒ¼ã‚¸ã®é–¢ä¿‚ã‚’è©³ã—ãè¦‹ã¦ã¿ã‚‹ - Qiita
å¤§äººæ°—TBSãƒ‰ãƒ©ãƒžã€ã€Œé€ƒã’ã‚‹ã¯æ¥ã ãŒå½¹ã«ç«‹ã¤ã€ã§ã‚‚è©±é¡Œã«ãªã£ãŸã‚¤ãƒ³ãƒ•ãƒ©ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã¨ã„ã†è¨€è‘‰ã§ã™ãŒã€ä»Šã§ã¯ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒƒãƒˆã‚¤ãƒ³ãƒ•ãƒ©ã‚’çŸ¥ã‚‰ãªã„ã¾ã¾é–‹ç™ºã‚’ã™ã‚‹ã®ã‚‚é›£ã—ã„çŠ¶æ³ã«ãªã£ã¦ã„ã¾ã™ã€‚ã‚¯ãƒ©ã‚¦ãƒ‰ãŒä¸€èˆ¬åŒ–ã•ã‚ŒãŸã‹ã‚‰ã¨ã„ã£ã¦å˜ã«ãƒªã‚½ãƒ¼ã‚¹ã®èª¿é”ãŒç°¡å˜ã«ãªã£ãŸã ã‘ã§ã€ã¤ã¾ã‚Šãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã®çŸ¥è˜ãŒç„¡ãã¦ã‚‚ä½•ã¨ã‹ã‚„ã£ã¦ã„ã‘ã‚‹ã‚ˆã†ã«ãªã£ãŸã ã‘ã§ã‚ã‚Šã€ã‚¤ãƒ³ãƒ•ãƒ©ã®çŸ¥è˜ãŒè¦ã‚‰ãªããªã£ãŸãªã©ã¨ã„ã†ã“ã¨ã¯å…¨ããªãã€ã‚€ã—ã‚devopsã®æŽ›ã‘å£°ã¨ã¨ã‚‚ã«ã€ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢é–‹ç™ºè€…ã«ã‚¤ãƒ³ãƒ•ãƒ©ã‚’è¦‹ãªã‘ã‚Œã°ãªã‚‰ãªã„æ–°ãŸãªè²¬å‹™ãŒèª²ã›ã‚‰ã‚ŒãŸã¨ã„ã†ã€ãªã‹ãªã‹ç—ºã‚Œã‚‹çŠ¶æ³ãªã®ã ã‚ã†ã¨æ€ã„ã¾ã™ã€‚ ãã†ã„ã£ãŸä¸ã§ã€å…ˆæ—¥ã®ã•ãã‚‰ã‚¤ãƒ³ã‚¿ãƒ¼ãƒãƒƒãƒˆã®Advent Calendaræœ€çµ‚æ—¥ã«ã€Œã„ã¾ã•ã‚‰èžã‘ãªã„Linuxã¨ãƒ¡ãƒ¢ãƒªã®åŸºç¤Žï¼†vmstatã®è©³ã—ã„ä½¿ã„æ–¹ã€ã¨ã„ã†è¨˜äº‹ã‚’æ›¸ã‹ã›ã¦é ‚ãã¾ã—ãŸãŒã€ä»Šå›žã¯Linuxã‚µãƒ¼ãƒã®ã€Œè² è·ã€ã¨ã€ãƒãƒ¼ãƒ‰ã‚¢ãƒ™ãƒ¬ãƒ¼ã‚¸ã«é–¢ã—ã¦ã€æŽ˜ã‚Šä¸‹ã’
yu4u 2017/01/04
linux

CPU

server

performance

devops
ãƒªãƒ³ã‚¯
ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã®block sizeã‚’èª¿ã¹ã‚‹ã«ã¯ at nkjmkzk.net
OSã®å†…éƒ¨æ§‹é€ ï¼ˆãƒ¡ãƒ¢ãƒªã¨ã‹ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã¨ã‹ï¼‰ã‚’è¦‹ã¦ã„ã‚‹ã¨ã„ã‚ã‚“ãªå˜ä½ãŒã§ã¦ãã¾ã™ã€‚ ã‚»ã‚°ãƒ¡ãƒ³ãƒˆ ãƒšãƒ¼ã‚¸ãƒ•ãƒ¬ãƒ¼ãƒ ãƒšãƒ¼ã‚¸ ãƒ–ãƒãƒƒã‚¯ ã‚»ã‚¯ã‚¿ ç‰ã€…ã€‚ ã‚„ã‚„ã“ã—ã„é™ã‚Šã§ã™ã€‚ ãŸã¨ãˆã°ãƒšãƒ¼ã‚¸ã§ã‚ã‚Œã°ç¾åœ¨ã®ãƒ¢ãƒ€ãƒ³ãªLinuxã¯4KbyteãŒä¸€èˆ¬çš„ã§ã™ã€‚ ã—ã‹ã—ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã®block sizeã¨ãªã‚‹ã¨ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆå€¤ã¯ã‚ã‚‹ã‚‚ã®ã®ã€ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ æ¯Žï¼ˆext2,ext3,jfs,xfs,reiserfs,ocfs2ï¼‰ã«ãã®ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆãŒç•°ãªã£ã¦ã„ãŸã‚Šã—ã¾ã™ã—ã€ãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆæ™‚ã«æŒ‡å®šå¯èƒ½ãªå€¤ãªã®ã§ãƒšãƒ¼ã‚¸ã‚µã‚¤ã‚ºã»ã©ç”»ä¸€åŒ–ã•ã‚Œã¦ã„ã¾ã›ã‚“ã€‚ã‚ˆãä½¿ç”¨ã™ã‚‹ãƒ•ã‚¡ã‚¤ãƒ«ã‚µã‚¤ã‚ºã«ã‚ˆã£ã¦æœ€é©ãªå€¤ã‚’é¸æŠžã™ã‚‹ã®ãŒãƒ™ã‚¹ãƒˆã¨ã•ã‚Œã¦ã„ã¾ã™ã€‚ ãªã®ã§ã€Œä»Šã“ã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã®block sizeã£ã¦ã„ãã¤ã«ãªã£ã¦ã‚“ã®ï¼Ÿã€ã¨ã„ã†ã®ãŒã‚ã‹ã‚‰ãªããªã‚‹ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚ãã‚“ãªã¨ãã€ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ãŒext2ã¾ãŸã¯ext3ã§ã‚ã‚Œã°tune2fsã§
yu4u 2016/11/02
sar

block size

block

linux
ãƒªãƒ³ã‚¯
Ubuntu ã‹ã‚‰ Windows ã®å…±æœ‰ãƒ•ã‚©ãƒ«ãƒ€ã‚’ãƒžã‚¦ãƒ³ãƒˆã—ã¦åˆ©ç”¨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?
yu4u 2016/10/11
linux

ubuntu

samba
ãƒªãƒ³ã‚¯
Linuxé–‹ç™ºç’°å¢ƒã®åŸºç¤ŽçŸ¥è˜ - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article?
yu4u 2016/09/07
linux
ãƒªãƒ³ã‚¯
Dockerã‚³ãƒžãƒ³ãƒ‰ãƒ¡ãƒ¢ - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article?
yu4u 2016/09/05
ãƒ¡ãƒ¢ãƒ¡ãƒ¢

docker

linux

command
ãƒªãƒ³ã‚¯
Armadillo-IoTã‚²ãƒ¼ãƒˆã‚¦ã‚§ã‚¤ã®æ¦‚è¦
IoTã‚²ãƒ¼ãƒˆã‚¦ã‚§ã‚¤å‘ã‘ã®ãƒ—ãƒã‚°ãƒ©ãƒžãƒ–ãƒ«ãªãƒ—ãƒ©ãƒƒãƒˆãƒ•ã‚©ãƒ¼ãƒ ã§ã™ã€‚ãƒ¦ãƒ¼ã‚¶ãƒ¼ãŒã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã‚’è‡ªç”±ã«é–‹ç™ºã—ã€ç‹¬è‡ªã®è£½å“ã‚’ä½œã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚é‡ç”£æ™‚ã«ã”åˆ©ç”¨ã„ãŸã ã‘ã‚‹ã€ŒBTOã‚µãƒ¼ãƒ“ã‚¹ã€ã§ã¯ã€æè¼‰ã™ã‚‹ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã‚„ã‚±ãƒ¼ã‚¹ã®æœ‰ç„¡ãªã©ã‚’é¸æŠžã§ãã‚‹ã»ã‹ã€ROMã‚¤ãƒ¡ãƒ¼ã‚¸ã®æ›¸ãè¾¼ã¿ã«ã‚‚å¯¾å¿œã—ã¾ã™ã€‚ ãƒ©ã‚¤ãƒ³ã‚¢ãƒƒãƒ— Armadillo-IoTã‚²ãƒ¼ãƒˆã‚¦ã‚§ã‚¤ G4 ã‚¨ãƒƒã‚¸AIå‡¦ç†ãƒ»æ©Ÿæ¢°å¦ç¿’ã«å¯¾å¿œ i.MX 8M Plus (1.6GHz 4ã‚³ã‚¢) ãƒ¡ãƒ¢ãƒª 2GB ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ 10GB eMMC LTE Cat.4å¯¾å¿œ NPU(2.3TOPS)æè¼‰
yu4u 2015/01/27
iot

linux
ãƒªãƒ³ã‚¯
Man page of PROC
Section: Linux Programmer's Manual (5) Updated: 2015-01-22 Index JM Home Page roff page åå‰ proc - ãƒ—ãƒã‚»ã‚¹ã®æƒ…å ±ã‚’å«ã‚€æ“¬ä¼¼ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ èª¬æ˜Ž proc ãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã¯æ“¬ä¼¼çš„ãªãƒ•ã‚¡ã‚¤ãƒ«ã‚·ã‚¹ãƒ†ãƒ ã§ã‚ã‚Šã€ ã‚«ãƒ¼ãƒãƒ«å†…ã®ãƒ‡ãƒ¼ã‚¿ã¸ã®ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ãƒ¼ã‚¹ã¨ã—ã¦ä½¿ç”¨ã•ã‚Œã‚‹ã€‚ ä¸€èˆ¬çš„ã«ã¯ /proc ã«ãƒžã‚¦ãƒ³ãƒˆã•ã‚Œã‚‹ã€‚ å¤§éƒ¨åˆ†ã®ãƒ•ã‚¡ã‚¤ãƒ«ã¯èªã¿å‡ºã—å°‚ç”¨ (read-only) ã§ã‚ã‚‹ãŒã€ ã„ãã¤ã‹ã®ãƒ•ã‚¡ã‚¤ãƒ«ã¯æ›¸ãè¾¼ã¿å¯èƒ½ã§ã‚ã‚Šã€ ãã®ãƒ•ã‚¡ã‚¤ãƒ«ã«æ›¸ãè¾¼ã‚ã°ã‚«ãƒ¼ãƒãƒ«ã®å†…éƒ¨å¤‰æ•°ã‚’å¤‰æ›´ã§ãã‚‹ã€‚ ä»¥ä¸‹ã®ãƒªã‚¹ãƒˆã§ã¯ /proc éšŽå±¤ä»¥ä¸‹ã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚„ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã®å¤šãã«ã¤ã„ã¦èª¬æ˜Žã—ã¦ã„ã‚‹ã€‚ /proc/[pid] å®Ÿè¡Œä¸ã®ãƒ—ãƒã‚»ã‚¹ã«ã¤ã„ã¦ã®ã‚µãƒ–ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã€‚ ã‚µãƒ–ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªåã¯ (ãã®ãƒ—ãƒã‚»ã‚¹ã®) ãƒ—ãƒã‚»ã‚¹ ID ã§ã‚
yu4u 2013/03/14
memory

performance

tips

linux
ãƒªãƒ³ã‚¯
ï¼ ITï¼šLinuxèµ·å‹•ã®ä»•çµ„ã¿ã‚’ç†è§£ã—ã‚ˆã†ï¼»rcã‚¹ã‚¯ãƒªãƒ—ãƒˆç·¨ï¼½
ã“ã®è¨˜äº‹ã§åˆ†ã‹ã‚‹ã“ã¨ Linuxèµ·å‹•æ™‚ã®ã‚µãƒ¼ãƒ“ã‚¹ç®¡ç†ã‚’æ‹…ã†ã€Œrcã‚¹ã‚¯ãƒªãƒ—ãƒˆã€ã®ä»•çµ„ã¿ã¨å½¹å‰² ãƒ©ãƒ³ãƒ¬ãƒ™ãƒ«ã”ã¨ã®rcã‚¹ã‚¯ãƒªãƒ—ãƒˆã«ã‚ˆã‚‹å‹•ä½œåˆ¶å¾¡ Red Hat Linux 7.2ã§å®Ÿéš›ã«rcã‚¹ã‚¯ãƒªãƒ—ãƒˆãŒã©ã®ã‚ˆã†ãªå‡¦ç†ã‚’ã™ã‚‹ã®ã‹ å‰å›žã®Linuxèµ·å‹•ã®ä»•çµ„ã¿ã‚’ç†è§£ã—ã‚ˆã†ï¼»init/inittabç·¨ï¼½ã§ã¯ã€ã‚«ãƒ¼ãƒãƒ«ãŒinitãƒ—ãƒã‚»ã‚¹ã‚’èµ·å‹•ã—ã¦ã€ã•ã¾ã–ã¾ãªå‡¦ç†ã‚’è¡Œã†ã“ã¨ã‚’èª¬æ˜Žã—ã¾ã—ãŸã€‚ä»Šå›žã¯ã€å„ç¨®ã‚µãƒ¼ãƒ“ã‚¹ã®èµ·å‹•ã‚’è¡Œã†rcã‚¹ã‚¯ãƒªãƒ—ãƒˆã«ã¤ã„ã¦è¦‹ã¦ã„ãã¾ã—ã‚‡ã†ã€‚ rcã‚¹ã‚¯ãƒªãƒ—ãƒˆã®ç®¡ç†ã®ä»•çµ„ã¿ rcã‚¹ã‚¯ãƒªãƒ—ãƒˆã¯ã€Windowsã®autoexec.batã«ç›¸å½“ã™ã‚‹ã¨è€ƒãˆã‚Œã°ã„ã„ã§ã—ã‚‡ã†ã€‚ã‚‚ã¡ã‚ã‚“ã€rcã‚¹ã‚¯ãƒªãƒ—ãƒˆã¨autoexec.batã§ã¯ç•°ãªã‚‹ç‚¹ãŒã‚ã‚Šã¾ã™ã€‚rcã‚¹ã‚¯ãƒªãƒ—ãƒˆã¯ã€å¯¾å¿œã™ã‚‹ä½œæ¥ã”ã¨ã«1ã¤ãšã¤ã€è¤‡æ•°ã®ãƒ•ã‚¡ã‚¤ãƒ«ã§æ§‹æˆã•ã‚Œã¦ã„ã¾ã™ã€‚ã¾ãŸã€ãƒ©ãƒ³ãƒ¬ãƒ™ãƒ«ã”ã¨ã«å®Ÿè¡Œã™ã‚‹rcã‚¹ã‚¯ãƒªãƒ—ãƒˆã‚’å¤‰ãˆã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ rc
yu4u 2012/11/08
linux

tips

init.d
ãƒªãƒ³ã‚¯
ãƒã‚°ã‚¢ã‚¦ãƒˆã—ã¦ã‚‚ãƒãƒƒã‚¯ã‚°ãƒ©ã‚¦ãƒ³ãƒ‰ ã‚¸ãƒ§ãƒ–ã‚’ç¶™ç¶šã™ã‚‹æ–¹æ³•
ã¯ã˜ã‚ã« SSH æŽ¥ç¶šã§æ™‚é–“ã®æŽ›ã‹ã‚‹ã‚·ã‚§ãƒ«ã‚¹ã‚¯ãƒªãƒ—ãƒˆã‚’ãƒãƒƒã‚¯ã‚°ãƒ©ã‚¦ãƒ³ãƒ‰ã§èµ°ã‚‰ã›ã¦å¸°ã‚ŠãŸã„ã®ã«ã€SSH æŽ¥ç¶šã‚’åˆ‡ã‚‹ã¨ã‚¸ãƒ§ãƒ–ãŒæ»ã‚“ã§ã—ã¾ã„ã¾ã™ã€‚SSH æŽ¥ç¶šã«é™ã‚‰ãšç›®ã®å‰ã® OS ã‹ã‚‰ãƒã‚°ã‚¢ã‚¦ãƒˆã—ãŸã‚Šã‚¿ãƒ¼ãƒŸãƒŠãƒ« ã‚¨ãƒŸãƒ¥ãƒ¬ãƒ¼ã‚¿ã‚’çµ‚äº†ã—ã¦ã‚‚åŒã˜ç¾è±¡ãŒèµ·ã“ã‚Šã¾ã™ã€‚ ã“ã®ç—‡çŠ¶ã¯æ£å¸¸ã§ã™ã€‚ãªãœãªã‚‰ã€ãƒãƒƒã‚¯ã‚°ãƒ©ã‚¦ãƒ³ãƒ‰ ã‚¸ãƒ§ãƒ–ã‚’èµ·å‹•ã—ãŸãƒ—ãƒã‚»ã‚¹(ãƒã‚°ã‚¤ãƒ³ ã‚·ã‚§ãƒ«)ãŒåãƒ—ãƒã‚»ã‚¹ã§ã‚ã‚‹è©²å½“ã®ãƒãƒƒã‚¯ã‚°ãƒ©ã‚¦ãƒ³ãƒ‰ã‚¸ãƒ§ãƒ–ã‚’ãƒãƒ³ã‚°ã‚¢ãƒƒãƒ— ã‚·ã‚°ãƒŠãƒ«( HUP )ã«ã‚ˆã£ã¦çµ‚äº†ã•ã›ã‚‹ã‹ã‚‰ã§ã™ã€‚ ã‚·ã‚§ãƒ«ã‚¹ã‚¯ãƒªãƒ—ãƒˆã‚’èµ·å‹•ã—ãŸè¦ªãƒ—ãƒã‚»ã‚¹ã¯åãƒ—ãƒã‚»ã‚¹ã®çµ‚äº†çŠ¶æ…‹ã‚’ç›£è¦–ã—ã¦ã„ã¾ã™ã€‚ã§ã™ã‹ã‚‰ãƒã‚°ã‚¢ã‚¦ãƒˆã—ã¦è¦ªãƒ—ãƒã‚»ã‚¹ã§ã‚ã‚‹ã‚·ã‚§ãƒ«ãŒçµ‚äº†ã™ã‚‹ã¨åãƒ—ãƒã‚»ã‚¹ã¯ã‚¾ãƒ³ãƒ“ ãƒ—ãƒã‚»ã‚¹ã¨ãªã£ã¦ã—ã¾ã†ã®ã§è¦ªãƒ—ãƒã‚»ã‚¹ã¨ãªã‚‹ã‚·ã‚§ãƒ«(ãƒã‚°ã‚¤ãƒ³ã‚·ã‚§ãƒ«)ã¯åãƒ—ãƒã‚»ã‚¹ã§ã‚ã‚‹ãƒãƒƒã‚¯ã‚°ãƒ©ã‚¦ãƒ³ãƒ‰ ã‚¸ãƒ§ãƒ–ã‚’ kill ( kill -HUP ) ã™ã‚‹ã®ã§ã™ã€‚ nohup ã‚³ãƒžãƒ³ãƒ‰
yu4u 2012/05/08
ssh

nohup
ãƒªãƒ³ã‚¯
JavaScript is not available.
Some privacy related extensions may cause issues on x.com. Please disable them and try again.
yu4u 2012/04/16
vps

ã•ãã‚‰VPS

tips

centos

linux

security
ãƒªãƒ³ã‚¯
ã„ã‚„ãªãƒ–ãƒã‚°: Linux ã®å…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚’ä½œã‚‹ã¨ã PIC ã§ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã™ã‚‹ã®ã¯ãªãœã‹
Linux ã®å…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚’ä½œã‚‹ã¨ã PIC ã§ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã™ã‚‹ã®ã¯ãªãœã‹ é€šå¸¸ã€Linux ã®å…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚’ä½œã‚‹ã¨ãã¯å„ .c ãƒ•ã‚¡ã‚¤ãƒ«ã‚’ PIC (Position Independent Code) ã¨ãªã‚‹ã‚ˆã†ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã—ã¾ã™ã€‚ã—ã‹ã—ã€å®Ÿã¯ PIC ã§ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã—ãªãã¦ã‚‚å…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã¯ä½œã‚Œã¾ã™ã€‚ãã‚Œã§ã¯ PIC ã«ã™ã‚‹æ„å‘³ã¯ã‚ã‚‹ã®ã§ã—ã‚‡ã†ã‹ã€‚ ã•ã£ããå®Ÿé¨“ã—ã¦ã¿ã¾ã™ã€‚ int func () { printf(""); printf(""); printf(""); } PIC ã§ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã™ã‚‹ã«ã¯ gcc ã« -fpic ã¾ãŸã¯ -fPIC ã‚’æ¸¡ã—ã¾ã™ã€‚-fpic ã®æ–¹ãŒå°ã•ãé«˜é€Ÿãªã‚³ãƒ¼ãƒ‰ã‚’ç”Ÿæˆã™ã‚‹å¯èƒ½æ€§ãŒã‚ã‚Šã¾ã™ãŒã€ãƒ—ãƒã‚»ãƒƒã‚µã«ã‚ˆã£ã¦ã¯ -fpic ã§ç”Ÿæˆã§ãã‚‹ GOT (Global Offset Table) ã®ã‚µã‚¤ã‚ºã«åˆ¶é™ãŒã‚ã‚Šã¾ã™ã€‚ä¸€æ–¹ã€-fPIC ã¯ã©ã®ãƒ—ãƒã‚»ãƒƒã‚µã§
yu4u 2012/04/11
linux

library
ãƒªãƒ³ã‚¯
ãƒ†ã‚ã‚¹ãƒˆãƒ•ã‚¡ã‚¤ãƒ«ã‚’å‡¦ç†ã™ã‚‹ã¨ãã®Unixã‚³ãƒžãƒ³ãƒ‰ã¾ã¨ã‚ - nokunoã®æ—¥è¨˜
å€‹äººçš„ã«ãƒ†ã‚ã‚¹ãƒˆãƒ•ã‚¡ã‚¤ãƒ«ã‚’å‡¦ç†ã™ã‚‹ã“ã¨ãŒå¤šã„ã®ã§ã™ãŒï¼Œç°¡å˜ãªå‡¦ç†ãªã‚‰Unixã®ã‚³ãƒžãƒ³ãƒ‰ã‚’ãƒ‘ã‚¤ãƒ—ã¨ãƒªãƒ€ã‚¤ãƒ¬ã‚¯ãƒˆã§çµ„ã¿åˆã‚ã›ã¦ã§ãã‚‹ã“ã¨ãŒå¤šãã‚ã‚Šã¾ã™ï¼Žä»Šå›žã¯ãã‚“ãªãªã‹ã§ã‚‚ã¡ã‚‡ã£ã¨ãƒžãƒ‹ã‚¢ãƒƒã‚¯ãªTIPSã‚’ã¾ã¨ã‚ã¦ã¿ã¾ã—ãŸï¼Ž sortã‚³ãƒžãƒ³ãƒ‰ã§ã‚¿ãƒ–åŒºåˆ‡ã‚Šã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚’æŒ‡å®šã™ã‚‹æœ€è¿‘çŸ¥ã£ã¦é©šæ„•ã—ãŸã®ãŒã“ã‚Œï¼Žsortã‚³ãƒžãƒ³ãƒ‰ã§ã‚¿ãƒ–åŒºåˆ‡ã‚Šã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚’æŒ‡å®šã—ãŸã„ã¨ãã¯ï¼ŒCtrl+v Tabã§ã‚¿ãƒ–æ–‡å—ã‚’å…¥åŠ›ã—ã¦ã„ãŸã®ã§ã™ãŒï¼Œ$ sort -t $'\t' -k 2,2 ã®ã‚ˆã†ã«ã—ã¦ã‚¿ãƒ–åŒºåˆ‡ã‚Šã§2ç•ªç›®ã®ã‚ãƒ¼ã§ã‚½ãƒ¼ãƒˆã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ï¼Ž 1000è¡ŒãŠãã«ãƒ‡ãƒ¼ã‚¿ã‚’ã‚µãƒ³ãƒ—ãƒªãƒ³ã‚°ã™ã‚‹1000è¡ŒãŠãã«ãƒ•ã‚¡ã‚¤ãƒ«ã‹ã‚‰ãƒ‡ãƒ¼ã‚¿ã‚’ã‚µãƒ³ãƒ—ãƒªãƒ³ã‚°ã—ãŸã„ã¨ãã¨ã‹ã¯ï¼Œperlã§ãƒ¯ãƒ³ãƒ©ã‚¤ãƒŠãƒ¼ã‚’æ›¸ãã®ãŒé€Ÿã„ã‚ˆã†ã§ã™ï¼Ž$ perl -ne '$i++; print unless ($i % 1000)' æŸæ‰€ã®ã‚³ãƒ¼ãƒ‰ã‚´ãƒ«ãƒ•ã«ã‚ˆã‚‹ã¨ã“ã‚Œã ã‘çŸãã§ã
yu4u 2012/01/23
perl

tips

linux

command
ãƒªãƒ³ã‚¯
Linuxã§ã†ã£ã‹ã‚Šrm -rfã—ã¡ã‚ƒã£ãŸã‘ã©å¾©æ´»å‡ºæ¥ãŸã‚ˆãƒ¼ï¼¼(ï¼¾oï¼¾)ï¼ - y-kawazã®æ—¥è¨˜
ã‚µãƒ¼ãƒã®ãƒ•ã‚¡ã‚¤ãƒ«æ•´ç†ä½œæ¥ã‚’ã—ã¦ã„ãŸã¨ã“ã‚â€¦ã€ é–“é•ãˆã¦rm -rfã—ã¦ã—ã¾ã£ãŸï¼ ãŽã‚ƒãƒ¼ãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—ã‚‚ããƒ¼ï¼ é•·ã„ã“ã¨ç”Ÿãã¦ãŸã‚‰ã“ã‚“ãªçµŒé¨“ã®1åº¦ã‚„2åº¦ã¯ã‚ã‚Šã¾ã™ã‚ˆãï¼Ÿ ãˆã‡ã€ã¤ã„ã•ã£ãã‚„ã‚‰ã‹ã—ã¡ã‚ƒã„ã¾ã—ãŸï½—ï½—ã‚ªãƒ¯ã‚¿ï½—ï½—ï½— é€Ÿæ”»ã€Œrm å¾©æ´»ã€ã¨ã‹ã€Œrm å–ã‚Šæ¶ˆã—ã€ã¨ã‹ã§ã‚°ã‚°ãƒƒãŸãï½—ã€ã—ãŸã‚‰mcã£ã¦ãƒ—ãƒã‚°ãƒ©ãƒ ã®Undeleteæ©Ÿèƒ½ä½¿ãˆã°ã‚ˆã„ã£ã¦æƒ…å ±ãŒå‡ºã¦ãã‚‹ãŒã€ã©ã†ã‚„ã‚‰ã“ã‚Œext2ã˜ã‚ƒãªã„ã¨ä½¿ãˆãªã„ã£ã½ã„ãžâ€¦ã€ã†ã¡ext4ã ã€‚ æ··ä¹±ã€‚ä»¥ä¸‹ã‚¿ãƒ¼ãƒŸãƒŠãƒ«ã®ãƒ’ã‚¹ãƒˆãƒªãƒ¼ã‚ˆã‚Šå®Ÿæ³ã€‚ ## ã“ãƒ¼ã„ã†ã¨ãã¯ã¾ãšã‚ã‚Œã ã€ç¾å ´ä¿å˜ï¼ ## ã¾ãšã¯ä»Šã„ã‚‹ãƒ‘ãƒ¼ãƒ†ã‚£ã‚·ãƒ§ãƒ³ã‚’ç¢ºèª # df -hT Filesystem Type ã‚µã‚¤ã‚º ä½¿ç”¨ æ®‹ã‚Š ä½¿ç”¨% ãƒžã‚¦ãƒ³ãƒˆä½ç½® /dev/sdb2 ext4 193G 6.9G 176G 4% / /dev/sdb1 ext3 194M 22M 163M 12% /boot /d
yu4u 2011/01/23
linux

tips
ãƒªãƒ³ã‚¯
ã€CGIãƒ»Perlã€‘[Linux]ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã‚’å†å¸°çš„ã«ãŸã©ã‚Šãƒ•ã‚¡ã‚¤ãƒ«ä¸€è¦§ã‚’å–å¾—ã—ãŸã„
CGIãƒ»Perlä¾‹æ–‡é›† CGI(Perl)ã®ã‚µãƒ³ãƒ—ãƒ«ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ã‚³ãƒ”ãƒ¼ï¼†ãƒšãƒ¼ã‚¹ãƒˆã§ä½¿ãˆã‚‹ä¾¿åˆ©é›†ï¼ ã‚«ãƒ†ã‚´ãƒªãƒ¼ï¼šãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªÂ ã‚³ãƒžãƒ³ãƒ‰Â [Linux]ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã‚’å†å¸°çš„ã«ãŸã©ã‚Šãƒ•ã‚¡ã‚¤ãƒ«ä¸€è¦§ã‚’å–å¾—ã—ãŸã„ ç‰¹å®šã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªé…ä¸‹ã‚’å†å¸°çš„ã«ãŸã©ã‚Šãƒ•ã‚¡ã‚¤ãƒ«ä¸€è¦§ã‚’è¡¨ç¤ºãªã©ã—ãŸã„ã€‚ éšŽå±¤ã®æ·±ã•ãŒæ±ºã¾ã£ã¦ã„ã‚Œã°ã‹ã‚“ãŸã‚“ã«å–å¾—ã§ãã‚‹æ–¹æ³•ã‚‚ã‚ã‚‹ãŒã€éšŽå±¤ã¯ã¾ã¡ã¾ã¡ã§ã€ä»Šå¾Œã‚‚ãƒ€ã‚¤ãƒŠãƒŸãƒƒã‚¯ã«å¤‰åŒ–ã—ã¦ã„ãã€‚ã“ã®ã‚ˆã†ãªå ´åˆã«ã¯ã©ã†ã™ã‚Œã°è‰¯ã„ã ã‚ã†ã‹ã€‚ æ–¹æ³•ã¯ã„ãã¤ã‹ã‚ã‚‹ã€‚ Linuxãªã©ã®ã‚³ãƒžãƒ³ãƒ‰ã‚’ä½¿ã† ã‚ªãƒªã‚¸ãƒŠãƒ«ã®é–¢æ•°ã‚’ç”¨æ„ã™ã‚‹ File::Findãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã‚’ä½¿ç”¨ã™ã‚‹ â—‹Linuxãªã©ã®ã‚³ãƒžãƒ³ãƒ‰ã‚’ä½¿ã† è¡¨ç¤ºã™ã‚‹ã ã‘ã§ã‚ã‚Œã°ã€ãŠæ‰‹è»½ãªã®ã¯ ls ã®ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã‚’åˆ©ç”¨ã™ã‚‹æ–¹æ³•ã§ã‚ã‚‹ã€‚Rã‚ªãƒ—ã‚·ãƒ§ãƒ³ã‚’ã¤ã‘ã¦å®Ÿè¡Œã™ã‚‹ã¨ã€ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªãŒã‚ã£ãŸå ´åˆã€ãã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªä»¥ä¸‹ã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚‚å†å¸°çš„ã«è¡¨ç¤ºã—ã¦ãã‚Œã‚‹ã€‚ ä»¥ä¸‹ã®å®Ÿè¡Œä¾‹ã§ã¯2éšŽ
yu4u 2010/12/13
linux

tips

command
ãƒªãƒ³ã‚¯
ROS/Installation/WillowGarage - ROS Wiki
yu4u 2010/11/06
ros

linux

install
ãƒªãƒ³ã‚¯
ThinkPad X200ã«Ubuntu 10.04ã‚’ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ« - ãƒšãƒªãƒ£ã‚¦ãƒ‰ã®æ—¥
ã„ã„åŠ æ¸›Vistaã«ã‚‚å«Œæ°—ãŒã•ã—ã¦ãã¦ã€ãƒ¡ã‚¤ãƒ³ã®ãƒ‡ã‚¹ã‚¯ãƒˆãƒƒãƒ—ãŒOSXãªé–¢ä¿‚ä¸Šã€Windowsã ã¨ä½œæ¥ãŒã—ã¥ã‚‰ã„äº‹ã‚‚ã‚ã‚Šã€æœ€è¿‘ã‚²ãƒ¼ãƒ ã‚‚æ®†ã©ã—ã¦ãªã„ã—ã€ã¨ã„ã£ãŸè¨³ã§ã€ThinkPadã«Ubuntuã‚’ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã—ã¦ã¿ãŸã€‚ ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«USBãƒ¡ãƒ¢ãƒªã‚’ä½œæˆ X200ã«ã¯CD/DVDãƒ‰ãƒ©ã‚¤ãƒ–ãŒç„¡ã„ã€‚å¤–ä»˜ã‘ã®ç‰©ã‚’ä½¿ã†æ‰‹ã‚‚ã‚ã‚‹ãŒã€ä»Šã®ã¨ã“ã‚è‡ªåˆ†ãŒæŒã£ã¦ã„ãªã„ã®ã¨ã€ä»Šæ—¥ã¡ã‚‡ã†ã©ç§‹è‘‰åŽŸã§USBãƒ¡ãƒ¢ãƒªã‚’è²·ã£ã¦ããŸã®ã§ã€ã“ã‚Œã‚’ä½¿ã†äº‹ã«ã—ãŸã€‚ Ubuntuã®ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ãƒ‡ã‚£ã‚¹ã‚¯ã‚¤ãƒ¡ãƒ¼ã‚¸ã‹ã‚‰ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ©ãƒ¼ã®å…¥ã£ãŸUSBãƒ¡ãƒ¢ãƒªã‚’ä½œã‚‹ã«ã¯ã€UNetbootinã‚’ä½¿ãˆã°è‰¯ã„ã€‚ ãŸã ã—ã€OSXç‰ˆã¯ç„¡ã„ã€‚è‡ªåˆ†ã¯è€ƒãˆã‚‹ã®ã‚‚é¢å€’ã ã£ãŸã®ã§ã€VMWare Fusionä¸Šã®XPã‹ã‚‰USBãƒ¡ãƒ¢ãƒªã‚’èªè˜ã•ã›ã¦ã‚´ãƒªæŠ¼ã—çš„ã«UNetbootinã‚’ä½¿ã†ã¨ã„ã†æ–¹æ³•ã‚’ã¨ã£ãŸãŒã€ãã‚‚ãã‚‚å¤§æŠµã®äººã®å®¶ã«ã¯ãƒãƒƒãƒˆã«ç¹‹ã£ãŸWindowsã‹ã›ã‚ã¦Linux
yu4u 2010/11/03
ubuntu

thinkpad

linux
ãƒªãƒ³ã‚¯
http://vision.kuee.kyoto-u.ac.jp/~yosimoto/opencv/opencv-howto/
yu4u 2010/10/08
opencv

linux

ieee1394
ãƒªãƒ³ã‚¯
Using FireWire camera on Linux
Linuxã§FireWireã‚«ãƒ¡ãƒ©ã‚’åˆ©ç”¨ã—ã‚ˆã† Last update: $Date: 2003/02/26 19:13:50 $ Linuxã§FireWireã®ã‚«ãƒ¡ãƒ©ã‚’ä½¿ã†æ–¹æ³•ã‚’ã¾ã¨ã‚ã¦ãŠãï¼ŽãªãŠã“ã“ã§ã„ã†FireWire ã‚«ãƒ¡ãƒ©ã¨ã¯ã€Œç”»åƒéžåœ§ç¸®ã€ã®è¦æ ¼ã«å¾“ã£ãŸFireWireã‚«ãƒ¡ãƒ©ã®ã“ã¨ã‚’æŒ‡ã™ï¼Ž æ®‹å¿µãªãŒã‚‰ã‚½ãƒ‹ãƒ¼ã‚„ã‚ãƒ£ãƒŽãƒ³ã‹ã‚‰è²©å£²ã•ã‚Œã¦ã„ã‚‹å¸‚è²©ã®å®¶åºç”¨DVã‚«ãƒ¡ãƒ©ã¯ç”»åƒãŒ DVåœ§ç¸®ã•ã‚Œã¦ãŠã‚Šï¼Œä¸Šè¨˜ã®è¦æ ¼ã¨ã¯ç•°ãªã‚‹ãŸã‚ï¼Œä»¥ä¸‹ã®é€šã‚Šã®ä½œæ¥ã‚’ã—ã¦ã‚‚ ç”»åƒãƒ‡ãƒ¼ã‚¿ã‚’å–å¾—ã—ï¼Œä½¿ç”¨ã™ã‚‹ã“ã¨ã¯ã§ããªã„ (ãŸã ã—ï¼Œé€”ä¸ã¾ã§ã¯åŒã˜ä½œæ¥ã‚’ ã™ã‚‹ã“ã¨ã«ãªã‚‹ï¼Žå•é¡Œã¯å–ã‚Šè¾¼ã‚“ã ãƒ‡ãƒ¼ã‚¿ã®å½¢å¼ãŒé•ã†ãŸã‚ï¼Œå–å¾—ã—ãŸãƒ‡ãƒ¼ã‚¿ã® åœ§ç¸®ã‚’å¾©å…ƒã—ãªã„ã¨ç”»åƒãƒ‡ãƒ¼ã‚¿ã¨ã—ã¦æ‰±ãˆãªã„ã ã‘ã§ã‚ã‚ã†(æœªç¢ºèª))ï¼Ž ãªãŠkinoã¨ã„ã†ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ãŒ ã‚ã‚Šï¼Œã“ã‚Œã‚’ä½¿ã†ã¨å¸‚è²©ã®å®¶åºç”¨DVã‹ã‚‰ã®ã‚¹ãƒˆãƒªãƒ¼ãƒ ç”»åƒã‚’Linuxä¸Šã§è¦‹ã‚‹ã“ã¨ãŒ ã§ãã‚‹(ã“
yu4u 2010/09/04
linux

ieee1394

camera
ãƒªãƒ³ã‚¯
Pointgrey IEEE1394 Cameras on Linux
Pointgreyè£½ã®IEEE1394ã‚«ãƒ¡ãƒ©(grasshopper, dragonfly, fleaãªã©)ã‚’Linuxä¸Šã§ä½¿ã†æ–¹æ³•ã«ã¤ã„ã¦ï¼Žç‰¹ã«Pointgreyç‰¹æœ‰ã®æ©Ÿèƒ½ã®ä½¿ç”¨æ–¹æ³•ãªã©ï¼Ž 1 ç›®çš„ Pointgreyè£½ã®IEEE1394ã‚«ãƒ¡ãƒ©(dragonfly, fleaãªã©)ã‚’Linuxä¸Šã§ä½¿ã†ã«ã¯ï¼Œlibdc1394[2], libraw1394[3]ã‚’ä½¿ç”¨ã—ã¦ä¸€èˆ¬çš„ãªIIDC 1394-based Digital Camera (DCAM)ã¨ã—ã¦ä½¿ç”¨ã™ã‚Œã°ç”»åƒã‚ãƒ£ãƒ—ãƒãƒ£ãªã©ï¼ŒåŸºæœ¬çš„æ“ä½œã®ä¸Šã§ã¯å•é¡Œãªã„ï¼Ž ã—ã‹ã—Pointgreyã‚«ãƒ¡ãƒ©ç‰¹æœ‰ã®æ©Ÿèƒ½ï¼Œä¾‹ãˆã°æ’®å½±ç”»åƒã®éœ²å…‰é–‹å§‹æ™‚åˆ»ã‚’å–å¾—ã™ã‚‹æ©Ÿèƒ½ãªã©ã‚’ä½¿ç”¨ã™ã‚‹ã«ã¯ï¼Œã‚‚ã†å°‘ã—è‡ªåˆ†ã§ã‚³ãƒ¼ãƒ‰ã‚’æ›¸ãå¿…è¦ãŒã‚ã‚‹ï¼Ž ã“ã“ã§ã¯ï¼Œä¸€èˆ¬çš„DCAMã¨ã—ã¦ç”»åƒã‚’ã‚ãƒ£ãƒ—ãƒãƒ£ã™ã‚‹ã¾ã§ã®æ–¹æ³•ã¨ï¼Œã•ã‚‰ã«Pointgreyç‰¹æœ‰ã®æ©Ÿèƒ½ã‚’ä½¿ç”¨ã™ã‚‹æ–¹æ³•ã«ã¤ã„ã¦èª¬æ˜Žã™ã‚‹ï¼Ž 2
yu4u 2010/09/04
linux

ieee1394

camera
ãƒªãƒ³ã‚¯
Riue ã¡ã‚ƒã‚“ã®æ£è¦è¡¨ç¾è¬›åº§
2025 è‘—ä½œæ¨©. ä¸è¨±è¤‡è£½ ãƒ—ãƒ©ã‚¤ãƒã‚·ãƒ¼ãƒãƒªã‚·ãƒ¼
yu4u 2010/08/17
programming

regexp

linux

tips
ãƒªãƒ³ã‚¯
1 2 æ¬¡ã®ãƒšãƒ¼ã‚¸