{"id":790,"date":"2020-01-15T15:50:08","date_gmt":"2020-01-15T15:50:08","guid":{"rendered":"http:\/\/www.liutianfeng.com\/?p=790"},"modified":"2020-01-19T13:26:44","modified_gmt":"2020-01-19T13:26:44","slug":"lsof-linux%e4%b8%ad%e5%b8%b8%e7%94%a8%e7%9a%84%e8%bf%9b%e7%a8%8b%e3%80%81%e6%96%87%e4%bb%b6%e5%8d%a0%e7%94%a8%e6%9f%a5%e8%af%a2%e5%91%bd%e4%bb%a4%ef%bc%88%e5%8d%a0%e7%94%a8%e6%96%87%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/www.liutianfeng.com\/?p=790","title":{"rendered":"lsof – Linux\u4e2d\u5e38\u7528\u7684\u8fdb\u7a0b\u3001\u6587\u4ef6\u5360\u7528\u67e5\u8be2\u547d\u4ee4\uff08\u5360\u7528\u6587\u4ef6\u5220\u9664\u540e\u7684\u6062\u590d\uff09"},"content":{"rendered":"

Linux\u6709\u4e2a\u7279\u6027\uff1a\u4e00\u5207\u7686\u6587\u4ef6\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5f88\u591a\u7684\u4e1c\u897f\u90fd\u901a\u8fc7\u6587\u4ef6\u7684\u5f62\u5f0f\u6765\u8bbf\u95ee\u548c\u6539\u53d8\u3002<\/p>\n

\u4f8b\u5982\uff0c\u7cfb\u7edf\u52a0\u8f7d\u7684\u53c2\u6570\u867d\u7136\u5728\u5185\u5b58\u91cc\uff0c\u4f46\u6587\u4ef6\u7cfb\u7edf\uff08\u4f2a\u6587\u4ef6\u7cfb\u7edf\uff09\u4e2d\u6709\u4e00\u4e2a\u6587\u4ef6\u63a5\u53e3\uff0c\u7528\u4e8e\u5bf9\u53c2\u6570\u7684\u53d6\u503c\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n

\u6bd4\u5982\u6e05\u7a7a\u7f13\u5b58\u7684\u547d\u4ee4\uff1a<\/p>\n

# echo 3 > \/proc\/sys\/vm\/drop_caches<\/code><\/pre>\n
lsof\u662f\u4e00\u6b3e\u975e\u5e38\u5e38\u7528\u7684\u547d\u4ee4\u3002\u5982\u679c\u4f60\u60f3\u5220\u9664\u4e00\u4e2a\u5386\u53f2\u9057\u7559\u4e0b\u6765\u7684\u5927\u6587\u4ef6\uff0c\u4f46\u662f\u53c8\u4e0d\u786e\u5b9a\u8fd9\u4e2a\u6587\u4ef6\u662f\u5426\u662f\u6709\u7528\u7684\uff0c\u8fd9\u65f6\u5019\u5c31\u9700\u8981\u9a8c\u8bc1\u4e00\u4e0b\u7cfb\u7edf\u7684\u8fdb\u7a0b\u662f\u5426\u5728\u5360\u7528\u8fd9\u4e2a\u6587\u4ef6\uff0c\u8fd9\u65f6\u5019lsof\u5c31\u663e\u73b0\u51fa\u5b83\u7684\u4f5c\u7528\u3002<\/p>\n
# cd \/var\/log\/\r\n# lsof messages<\/code><\/pre>\n
\u5982\u679c\u663e\u793a\u51fa\u6709\u8fdb\u7a0b\u5360\u7528\uff0c\u5219\u8bf4\u660e\u6587\u4ef6\u88ab\u4f7f\u7528\u4e2d\uff0c\u4e00\u822c\u4e0d\u80fd\u968f\u610f\u5220\u9664\u3002<\/p>\n
# lsof messages \r\nCOMMAND  PID USER   FD   TYPE DEVICE SIZE\/OFF     NODE NAME\r\nrsyslogd 849 root    3w   REG  253,1   576192 68323904 messages<\/code><\/pre>\n
\u5e38\u7528\u53c2\u6570<\/h4>\n
\u4e0b\u9762\u662f\u5e38\u7528\u7684\u53c2\u6570\uff1a<\/p>\n
-a\uff1a\u5217\u51fa\u6253\u5f00\u6587\u4ef6\u5b58\u5728\u7684\u8fdb\u7a0b\uff1b \r\n-c<\u8fdb\u7a0b\u540d>\uff1a\u5217\u51fa\u6307\u5b9a\u8fdb\u7a0b\u6240\u6253\u5f00\u7684\u6587\u4ef6\uff1b \r\n-g\uff1a\u5217\u51faGID\u53f7\u8fdb\u7a0b\u8be6\u60c5\uff1b \r\n-d<\u6587\u4ef6\u53f7>\uff1a\u5217\u51fa\u5360\u7528\u8be5\u6587\u4ef6\u53f7\u7684\u8fdb\u7a0b\uff1b \r\n+d<\u76ee\u5f55>\uff1a\u5217\u51fa\u76ee\u5f55\u4e0b\u88ab\u6253\u5f00\u7684\u6587\u4ef6\uff1b \r\n+D<\u76ee\u5f55>\uff1a\u9012\u5f52\u5217\u51fa\u76ee\u5f55\u4e0b\u88ab\u6253\u5f00\u7684\u6587\u4ef6\uff1b \r\n-n<\u76ee\u5f55>\uff1a\u5217\u51fa\u4f7f\u7528NFS\u7684\u6587\u4ef6\uff1b \r\n-i<\u6761\u4ef6>\uff1a\u5217\u51fa\u7b26\u5408\u6761\u4ef6\u7684\u8fdb\u7a0b\u3002\uff084\u30016\u3001\u534f\u8bae\u3001:\u7aef\u53e3\u3001 @ip \uff09 \r\n-p<\u8fdb\u7a0b\u53f7>\uff1a\u5217\u51fa\u6307\u5b9a\u8fdb\u7a0b\u53f7\u6240\u6253\u5f00\u7684\u6587\u4ef6\uff1b \r\n-u\uff1a\u5217\u51faUID\u53f7\u8fdb\u7a0b\u8be6\u60c5\uff1b \r\n-h\uff1a\u663e\u793a\u5e2e\u52a9\u4fe1\u606f\uff1b \r\n-v\uff1a\u663e\u793a\u7248\u672c\u4fe1\u606f\u3002<\/code><\/pre>\n
\u91cc\u9762\u5e38\u7528\u5730\uff0c\u5e94\u8be5\u662f+D\u3001+d\u3001-i\u3001-p\u3001-u\u9009\u9879\u3002<\/p>\n
# lsof +D \/var\/log |egrep -v \"^bask|^lsof|^egrep\" \r\nCOMMAND   PID USER   FD   TYPE DEVICE SIZE\/OFF      NODE NAME\r\nauditd    812 root    4w   REG  253,1   608837 101539327 \/var\/log\/audit\/audit.log\r\ntuned     847 root    3w   REG  253,1     6354 101539326 \/var\/log\/tuned\/tuned.log\r\nrsyslogd  849 root    3w   REG  253,1   576192  68323904 \/var\/log\/messages\r\nrsyslogd  849 root    6w   REG  253,1     7562  68323905 \/var\/log\/secure\r\nrsyslogd  849 root    7w   REG  253,1     1840  68429834 \/var\/log\/cron\r\nrsyslogd  849 root    8w   REG  253,1      792  68323906 \/var\/log\/maillog\r\nbash     2471 root  cwd    DIR  253,1     4096  67149966 \/var\/log\r\nbash     2567 root  cwd    DIR  253,1     4096  67149966 \/var\/log<\/code><\/pre>\n
lsof\u6062\u590d\u8bef\u5220\u7684\u88ab\u5360\u7528\u6587\u4ef6<\/h4>\n
[root@localhost log]# lsof messages \r\nCOMMAND  PID USER   FD   TYPE DEVICE SIZE\/OFF     NODE NAME\r\nrsyslogd 849 root    3w   REG  253,1   576192 68323904 messages\r\n[root@localhost log]# rm messages\r\nrm\uff1a\u662f\u5426\u5220\u9664\u666e\u901a\u6587\u4ef6 \"messages\"\uff1fy\r\n[root@localhost log]# lsof |grep delete\r\nrsyslogd   849         root    3w      REG              253,1    576192   68323904 \/var\/log\/messages (deleted)\r\nin:imjour  849  859    root    3w      REG              253,1    576192   68323904 \/var\/log\/messages (deleted)\r\nrs:main    849  861    root    3w      REG              253,1    576192   68323904 \/var\/log\/messages (deleted)\r\n# \u8fdb\u7a0b\u53f7\u662f849\r\n[root@localhost log]# cd \/proc\/849\/fd\/\r\n[root@localhost fd]# ll\r\n\u603b\u7528\u91cf 0\r\nlr-x------. 1 root root 64 1\u6708  16 07:21 0 -> \/dev\/null\r\nl-wx------. 1 root root 64 1\u6708  16 07:21 1 -> \/dev\/null\r\nl-wx------. 1 root root 64 1\u6708  16 07:21 2 -> \/dev\/null\r\nl-wx------. 1 root root 64 1\u6708  16 07:21 3 -> \/var\/log\/messages (deleted)   \/\/ \u663e\u793adeleted\uff0c\u8bf4\u660e\u6ca1\u6709\u88ab\u5b8c\u5168\u5220\u9664\uff0c\u53ef\u4ee5\u6062\u590d\u3002\r\n[root@localhost fd]# cat 3 > \/var\/log\/messages\r\n[root@localhost fd]# cd \/var\/log\/\r\n[root@localhost log]# wc -l messages\r\n6773 messages\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0#\u00a0\u6587\u4ef6\u53c8\u56de\u6765\u4e86\u3002<\/code><\/pre>\n
 <\/p>\n
 <\/p>\n
\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1aliutianfeng.com<\/a> » lsof – Linux\u4e2d\u5e38\u7528\u7684\u8fdb\u7a0b\u3001\u6587\u4ef6\u5360\u7528\u67e5\u8be2\u547d\u4ee4\uff08\u5360\u7528\u6587\u4ef6\u5220\u9664\u540e\u7684\u6062\u590d\uff09<\/a><\/p>","protected":false},"excerpt":{"rendered":"
Linux\u6709\u4e2a\u7279\u6027\uff1a\u4e00\u5207\u7686\u6587\u4ef6\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5f88\u591a\u7684\u4e1c\u897f\u90fd\u901a\u8fc7\u6587\u4ef6\u7684\u5f62\u5f0f\u6765\u8bbf\u95ee\u548c\u6539\u53d8\u3002 \u4f8b\u5982\uff0c\u7cfb\u7edf\u52a0\u8f7d\u7684\u53c2\u6570\u867d\u7136\u5728 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/790"}],"collection":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=790"}],"version-history":[{"count":2,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/790\/revisions"}],"predecessor-version":[{"id":792,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/790\/revisions\/792"}],"wp:attachment":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}