{"id":16690,"date":"2024-11-18T10:34:41","date_gmt":"2024-11-18T02:34:41","guid":{"rendered":"https:\/\/fwq.ai\/blog\/16690\/"},"modified":"2024-11-18T10:34:41","modified_gmt":"2024-11-18T02:34:41","slug":"%e4%bb%8e-lsof-%e5%bc%80%e5%a7%8b%ef%bc%8c%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3-linux-%e8%99%9a%e6%8b%9f%e6%96%87%e4%bb%b6%e7%b3%bb%e7%bb%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/16690\/","title":{"rendered":"\u4ece lsof \u5f00\u59cb\uff0c\u6df1\u5165\u7406\u89e3 Linux \u865a\u62df\u6587\u4ef6\u7cfb\u7edf"},"content":{"rendered":"<p>  <\/p>\n<h3><span style=\"font-size: inherit;color: inherit;line-height: inherit\">\u80cc\u666f<\/span><\/h3>\n<p><span style=\"font-size: 15px\">\u6709\u65f6\u4f1a\u51fa\u73b0\u8fd9\u6837\u7684\u60c5\u51b5\uff0c\u78c1\u76d8\u7a7a\u95f4\u663e\u793a\u5df2\u7ecf\u88ab\u5360\u6ee1\uff0c\u4f46\u662f\u5728\u67e5\u770b\u78c1\u76d8\u7684\u5177\u4f53\u6587\u4ef6\u5360\u7528\u60c5\u51b5\u65f6\uff0c\u53d1\u73b0\u78c1\u76d8\u4ecd\u7136\u6709\u5f88\u5927\u7684\u7a7a\u4f59\u7a7a\u95f4\u3002<\/span><br \/>\n<span style=\"font-size: 15px\">1.\u6267\u884c<\/span><br \/>\n<span style=\"font-size: 15px\">df<\/span><br \/>\n<span style=\"font-size: 15px\">\u547d\u4ee4\u67e5\u770b\u78c1\u76d8\u4f7f\u7528\u60c5\u51b5\uff0c\u53d1\u73b0\u78c1\u76d8\u5df2\u7ecf\u6ee1\u4e86\u3002<\/span>   <\/p>\n<pre>-bash-4.2$&nbsp;df&nbsp;-ThFilesystem&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Type&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Size&nbsp;&nbsp;Used&nbsp;Avail&nbsp;Use%&nbsp;Mounted&nbsp;on\/dev\/vda1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ext4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;30G&nbsp;&nbsp;&nbsp;&nbsp;30G&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;100%&nbsp;\/devtmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;devtmpfs&nbsp;&nbsp;489M&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;489M&nbsp;&nbsp;&nbsp;0%&nbsp;\/devtmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;tmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;497M&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;497M&nbsp;&nbsp;&nbsp;0%&nbsp;\/dev\/shmtmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;tmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;497M&nbsp;&nbsp;&nbsp;50M&nbsp;&nbsp;447M&nbsp;&nbsp;11%&nbsp;\/runtmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;tmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;497M&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;497M&nbsp;&nbsp;&nbsp;0%&nbsp;\/sys\/fs\/cgroup<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><\/p>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><span style=\"font-size: 15px\">2.\u6267\u884c du \u547d\u4ee4\u67e5\u770b\u5404\u4e2a\u76ee\u5f55\u7684\u78c1\u76d8\u5360\u7528\u60c5\u51b5\uff0c\u628a\u5404\u4e2a\u76ee\u5f55\u6587\u4ef6\u7684\u5927\u5c0f\u76f8\u52a0\uff0c\u53d1\u73b0\u5e76\u6ca1\u6709\u5360\u6ee1\u78c1\u76d8\uff0c\u670910\u591aG\u7a7a\u95f4\u83ab\u540d\u5931\u8e2a\u3002<\/span><\/p>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><\/p>\n<pre>-bash-4.2$&nbsp;du&nbsp;-h&nbsp;--max-depth=1&nbsp;\/home16M&nbsp;&nbsp;&nbsp;&nbsp;\/home\/logs11G&nbsp;&nbsp;&nbsp;&nbsp;\/home\/serverdog11G&nbsp;&nbsp;&nbsp;&nbsp;\/home<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><\/p>\n<p><span style=\"font-size: 15px\">3.\u4e3a\u4f55\u4f1a\u51fa\u73b0\u8fd9\u6837\u7684\u60c5\u51b5\u5462\uff1f<\/span><br \/>\n<span style=\"font-size: 15px\">\u56e0\u4e3a\u867d\u7136\u6587\u4ef6\u5df2\u88ab\u5220\u9664\uff0c\u4f46\u662f\u4e00\u4e9b\u8fdb\u7a0b\u4ecd\u7136\u6253\u5f00\u8fd9\u4e9b\u6587\u4ef6\uff0c\u56e0\u6b64\u5176\u5360\u7528\u7684\u78c1\u76d8\u7a7a\u95f4\u5e76\u6ca1\u6709\u88ab\u91ca\u653e\u3002\u6267\u884c<\/span><br \/>\n<span style=\"font-size: 15px\">lsof<\/span><br \/>\n<span style=\"font-size: 15px\">&nbsp;\u547d\u4ee4\u663e\u793a\u6253\u5f00\u5df2\u5220\u9664\u7684\u6587\u4ef6\u3002\u5c06\u6709\u95ee\u9898\u7684\u8fdb\u7a0b\u91cd\u542f\uff08\u6216\uff0c\u6e05\u7a7a\uff09\uff0c\u78c1\u76d8\u7a7a\u95f4\u5c31\u4f1a\u5f97\u5230\u91ca\u653e\u3002<\/span>   <\/p>\n<pre>-bash-4.2#&nbsp;lsof&nbsp;|&nbsp;grep&nbsp;deletemysqld&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2470&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mysql&nbsp;&nbsp;&nbsp;&nbsp;4u&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;REG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;253,1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;523577&nbsp;\/var\/tmp\/ibfTeQFn&nbsp;(deleted)mysqld&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2470&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mysql&nbsp;&nbsp;&nbsp;&nbsp;5u&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;REG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;253,1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;523579&nbsp;\/var\/tmp\/ibaHcIdW&nbsp;(deleted)mysqld&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2470&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mysql&nbsp;&nbsp;&nbsp;&nbsp;6u&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;REG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;253,1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;523581&nbsp;\/var\/tmp\/ibLjiALu&nbsp;(deleted)mysqld&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2470&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mysql&nbsp;&nbsp;&nbsp;&nbsp;7u&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;REG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;253,1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;523585&nbsp;\/var\/tmp\/ibCFnzTB&nbsp;(deleted)mysqld&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2470&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mysql&nbsp;&nbsp;&nbsp;11u&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;REG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;253,1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;523587&nbsp;\/var\/tmp\/ibCjuqva&nbsp;(deleted)<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236<br \/>\n<br \/> <br \/>\n<span style=\"font-size: 15px\">\u90a3\u4e48\uff0cLinux \u7684\u6587\u4ef6\u7cfb\u7edf\uff0c\u5230\u5e95\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u8bbe\u8ba1\u5462\uff1f\u8981\u4e86\u89e3\u8fd9\u4e9b\uff0c\u5c31\u8981\u5148\u5f04\u6e05\u695a\u5e76\u4e0d\u5bb9\u6613\uff0c\u4e0b\u9762\u5c06\u4ece\u4e00\u4e9b\u57fa\u672c\u6982\u5ff5\u5165\u624b\uff0c\u4e00\u6b65\u6b65\u5c06\u8fd9\u4e9b\u68b3\u7406\u6e05\u695a\uff1a<\/span>  <\/p>\n<ul>\n<li>\n<p style=\"text-align: left\">\u4ec0\u4e48\u662f\u865a\u62df\u6587\u4ef6\u7cfb\u7edf\uff08VFS\uff1a<span style=\"font-family: mp-quote, -apple-system-font, BlinkMacSystemFont,\">virtual filesystem\uff09\uff1f<\/span><\/p>\n<\/li>\n<li>\n<p style=\"text-align: left\">\u4ec0\u4e48\u662f\u901a\u7528\u6587\u4ef6\u6a21\u578b\uff1f<\/p>\n<\/li>\n<ul>\n<li>\n<p style=\"text-align: left\">\u8d85\u7ea7\u5757\u5bf9\u8c61\uff08superblock object\uff09<\/p>\n<\/li>\n<li>\n<p style=\"text-align: left\">\u7d22\u5f15\u8282\u70b9\u5bf9\u8c61\uff08inode object\uff09<\/p>\n<\/li>\n<li>\n<p style=\"text-align: left\">\u6587\u4ef6\u5bf9\u8c61\uff08file object\uff09<\/p>\n<\/li>\n<li>\n<p style=\"text-align: left\">\u76ee\u5f55\u9879\u5bf9\u8c61\uff08dentry object\uff09<\/p>\n<\/li>\n<li>\n<p style=\"text-align: left\">\u6587\u4ef6\u7684\u6982\u5ff5<\/p>\n<\/li>\n<\/ul>\n<li>\n<p style=\"text-align: left\">\u6587\u4ef6\u7684\u8868\u8fbe<\/p>\n<\/li>\n<ul>\n<li>\n<p style=\"text-align: left\">\u5185\u5b58\u8868\u8fbe<\/p>\n<\/li>\n<li>\n<p style=\"text-align: left\">\u78c1\u76d8\u8868\u8fbe<\/p>\n<\/li>\n<\/ul>\n<li>\n<p style=\"text-align: left\">\u76ee\u5f55\u6811\u7684\u6784\u5efa<\/p>\n<\/li>\n<ul>\n<li>\n<p style=\"text-align: left\">\u8f6f\u94fe\u63a5 vs \u786c\u94fe\u63a5<\/p>\n<\/li>\n<\/ul>\n<li>\n<p style=\"text-align: left\">\u6587\u4ef6 &amp; \u78c1\u76d8\u7ba1\u7406<\/p>\n<\/li>\n<ul>\n<li>\n<p style=\"text-align: left\">\u7d22\u5f15\u8282\u70b9\u72b6\u6001<\/p>\n<\/li>\n<\/ul>\n<li>\n<p style=\"text-align: left\">\u6587\u4ef6 &amp; \u8fdb\u7a0b\u7ba1\u7406<\/p>\n<\/li>\n<ul>\n<li>\n<p style=\"text-align: left\"><span style=\"font-size: 15px\">\u64cd\u4f5c\uff1a<\/span><\/p>\n<p style=\"text-align: left\"><span style=\"font-size: 15px\">\u6253\u5f00&amp;\u5220\u9664<\/span><\/p>\n<\/li>\n<\/ul>\n<\/ul>\n<h3><span style=\"font-size: inherit;color: inherit;line-height: inherit\">\u865a\u62df\u6587\u4ef6\u7cfb\u7edf\uff08virtual filesystem\uff09<\/span><\/h3>\n<p><span style=\"font-size: 15px\">\u4e0b\u56fe\u663e\u793a\u4e86 Linux \u64cd\u4f5c\u7cfb\u7edf\u4e2d\u8d1f\u8d23\u6587\u4ef6\u7ba1\u7406\u7684\u57fa\u672c\u7ec4\u4ef6\u3002\u4e0a\u534a\u533a\u57df\u4e3a\u7528\u6237\u6a21\u5f0f\uff0c\u4e0b\u534a\u533a\u57df\u4e3a\u5185\u6838\u6a21\u5f0f\u3002\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528\u6807\u51c6\u5e93libc\u6765\u8bbf\u95ee\u6587\u4ef6\uff0c\u5e93\u5c06\u8bf7\u6c42\u6620\u5c04\u5230\u7cfb\u7edf\u8c03\u7528\uff0c\u4ee5\u4fbf\u8fdb\u5165\u5185\u6838\u6a21\u5f0f\u3002<\/span>  <\/p>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/275\/013\/cafc92be0f5f55d3108b352132a91fec-0.png\" class=\"aligncenter\" title=\"\u4ece lsof \u5f00\u59cb\uff0c\u6df1\u5165\u7406\u89e3 Linux \u865a\u62df\u6587\u4ef6\u7cfb\u7edf\u63d2\u56fe\" alt=\"\u4ece lsof \u5f00\u59cb\uff0c\u6df1\u5165\u7406\u89e3 Linux \u865a\u62df\u6587\u4ef6\u7cfb\u7edf\u63d2\u56fe\" \/><\/p>\n<p><span style=\"font-size: 15px\">\u6240\u6709\u4e0e\u6587\u4ef6\u76f8\u5173\u7684\u64cd\u4f5c\u7684\u5165\u53e3\u90fd\u662f\u865a\u62df\u6587\u4ef6\u7cfb\u7edf\uff08VFS\uff09\uff0c\u800c\u975e\u7279\u5b9a\u7684\u989d\u6587\u4ef6\u7cfb\u7edf\uff08\u5982Ext3\u3001ReiserFS\u548cNFS\uff09\u3002VFS \u63d0\u4f9b\u4e86\u7cfb\u7edf\u5e93\u548c\u7279\u5b9a\u6587\u4ef6\u7cfb\u7edf\u4e4b\u95f4\u7684\u63a5\u53e3\u3002\u56e0\u6b64\uff0cVFS \u4e0d\u4ec5\u5145\u5f53\u62bd\u8c61\u5c42\uff0c\u800c\u4e14\u5b9e\u9645\u4e0a\u5b83\u63d0\u4f9b\u4e86\u4e00\u4e2a\u6587\u4ef6\u7cfb\u7edf\u7684\u57fa\u672c\u5b9e\u73b0\uff0c\u53ef\u4ee5\u7531\u4e0d\u540c\u7684\u5b9e\u73b0\u6765\u4f7f\u7528\u548c\u6269\u5c55\u3002\u56e0\u6b64\uff0c\u8981\u4e86\u89e3\u6587\u4ef6\u7cfb\u7edf\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff0c\u5c31\u8981\u5148\u4e86\u89e3VFS \u3002<\/span>  <\/p>\n<h3><span style=\"font-size: 16px\">\u901a\u7528\u6587\u4ef6\u6a21\u578b<\/span><\/h3>\n<p><span style=\"font-size: 15px\">VFS \u7684\u4e3b\u8981\u601d\u60f3\u5728\u4e8e\u5f15\u5165\u4e86\u4e00\u4e2a\u901a\u7528\u6587\u4ef6\u6a21\u578b\uff08common file model\uff09\u3002\u901a\u7528\u6587\u4ef6\u6a21\u578b\u7531\u4ee5\u4e0b\u5bf9\u8c61\u7c7b\u578b\u7ec4\u6210\uff1a<\/span>  <\/p>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><strong><span style=\"font-size: 15px\">\u8d85\u7ea7\u5757\u5bf9\u8c61\uff08superblock object\uff09<\/span><\/strong><\/p>\n<blockquote style=\"margin-top: 1.2em;margin-bottom: 1.2em;padding-top: 0px;padding-right: 1em;padding-left: 1em;border-left-width: 4px;font-family: -apple-system-font, BlinkMacSystemFont,\">\n<p style=\"text-align: left;margin-bottom: 1.2em !important\">\u5185\u5b58\uff1a\u6587\u4ef6\u7cfb\u7edf\u5b89\u88c5\u65f6\u521b\u5efa\uff0c\u5b58\u653e\u6587\u4ef6\u7cfb\u7edf\u7684\u6709\u5173\u4fe1\u606f<br \/>\u78c1\u76d8\uff1a\u5bf9\u5e94\u4e8e\u5b58\u653e\u5728\u78c1\u76d8\u4e0a\u7684\u6587\u4ef6\u7cfb\u7edf\u63a7\u5236\u5757\uff08filesystem control block\uff09<\/p>\n<\/blockquote>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><strong><span style=\"font-size: 15px\">\u7d22\u5f15\u8282\u70b9\u5bf9\u8c61\uff08inode object\uff09<\/span><\/strong><\/p>\n<blockquote style=\"margin-top: 1.2em;margin-bottom: 1.2em;padding-top: 0px;padding-right: 1em;padding-left: 1em;border-left-width: 4px;font-family: -apple-system-font, BlinkMacSystemFont,\">\n<p style=\"text-align: left;margin-bottom: 1.2em !important\">\u5185\u5b58\uff1a\u8bbf\u95ee\u65f6\u521b\u5efa\uff0c\u5b58\u653e\u5173\u4e8e\u5177\u4f53\u6587\u4ef6\u7684\u4e00\u822c\u4fe1\u606f\uff08inode \u7ed3\u6784\uff09<br \/>\u78c1\u76d8\uff1a\u5bf9\u5e94\u4e8e\u5b58\u653e\u5728\u78c1\u76d8\u4e0a\u7684\u6587\u4ef6\u63a7\u5236\u5757\uff08file control block\uff09<br \/>\u6bcf\u4e2a\u7d22\u5f15\u8282\u70b9\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u7d22\u5f15\u8282\u70b9\u53f7\uff0c\u552f\u4e00\u5730\u6807\u8bc6\u6587\u4ef6\u7cfb\u7edf\u7684\u6587\u4ef6<\/p>\n<\/blockquote>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><span style=\"font-size: 15px\"><strong>\u6587\u4ef6\u5bf9\u8c61\uff08file object\uff09<\/strong><\/span><\/p>\n<blockquote style=\"margin-top: 1.2em;margin-bottom: 1.2em;padding-top: 0px;padding-right: 1em;padding-left: 1em;border-left-width: 4px;font-family: -apple-system-font, BlinkMacSystemFont,\">\n<p style=\"text-align: left;margin-bottom: 1.2em !important\">\u5185\u5b58\uff1a\u6253\u5f00\u6587\u4ef6\u65f6\u521b\u5efa\uff0c\u5b58\u653e \u6253\u5f00\u6587\u4ef6 \u4e0e\u8fdb\u7a0b\u4e4b\u95f4\u8fdb\u884c\u4ea4\u4e92\u7684\u6709\u5173\u4fe1\u606f\uff08file \u7ed3\u6784\uff09<br \/>\u6253\u5f00\u6587\u4ef6\u4fe1\u606f\uff0c\u4ec5\u5f53\u8fdb\u7a0b\u8bbf\u95ee\u6587\u4ef6\u671f\u95f4\u5b58\u5728\u4e8e\u5185\u6838\u5185\u5b58\u4e2d\u3002<\/p>\n<\/blockquote>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><span style=\"font-size: 15px\"><strong>\u76ee\u5f55\u9879\u5bf9\u8c61\uff08dentry object\uff09<\/strong><\/span><\/p>\n<blockquote style=\"margin-top: 1.2em;margin-bottom: 1.2em;padding-top: 0px;padding-right: 1em;padding-left: 1em;border-left-width: 4px;font-family: -apple-system-font, BlinkMacSystemFont,\">\n<p style=\"text-align: left;margin-bottom: 1.2em !important\">\u5185\u5b58\uff1a\u76ee\u5f55\u9879\u4e00\u65e6\u88ab\u8bfb\u5165\u5185\u5b58\uff0cVFS\u5c31\u4f1a\u5c06\u5176\u8f6c\u6362\u6210dentry \u7ed3\u6784\u7684\u76ee\u5f55\u9879\u5bf9\u8c61<br \/>\u78c1\u76d8\uff1a\u7279\u5b9a\u6587\u4ef6\u7cfb\u7edf\u4ee5\u7279\u5b9a\u7684\u65b9\u5f0f\u5b58\u50a8\u5728\u78c1\u76d8\u4e0a<br \/>\u5b58\u653e\u76ee\u5f55\u9879\uff08\u5373\uff0c\u6587\u4ef6\u540d\u79f0\uff09\u4e0e\u5bf9\u5e94\u6587\u4ef6\u8fdb\u884c\u94fe\u63a5\u7684\u6709\u5173\u4fe1\u606f<\/p>\n<\/blockquote>\n<h3><span style=\"font-size: 16px\">\u76ee\u5f55\u6811<\/span><\/h3>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><span style=\"font-size: 15px\">\u7efc\u5408\u6765\u8bf4\uff0cLinux \u7684 \u6839\u6587\u4ef6\u7cfb\u7edf(system\u2019s root filessystem) \u662f\u5185\u6838\u542f\u52a8mount\u7684\u7b2c\u4e00\u4e2a\u6587\u4ef6\u7cfb\u7edf\u3002\u5185\u6838\u4ee3\u7801\u6620\u50cf\u6587\u4ef6\u4fdd\u5b58\u5728\u6839\u6587\u4ef6\u7cfb\u7edf\u4e2d\uff0c\u800c\u7cfb\u7edf\u5f15\u5bfc\u542f\u52a8\u7a0b\u5e8f\u4f1a\u5728\u6839\u6587\u4ef6\u7cfb\u7edf\u6302\u8f7d\u4e4b\u540e\uff0c\u4ece\u4e2d\u628a\u4e00\u4e9b\u57fa\u672c\u7684\u521d\u59cb\u5316\u811a\u672c\u548c\u670d\u52a1\u7b49\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u53bb\u8fd0\u884c\uff08\u6587\u4ef6\u7cfb\u7edf\u548c\u5185\u6838\u662f\u5b8c\u5168\u72ec\u7acb\u7684\u4e24\u4e2a\u90e8\u5206\uff09\u3002\u5176\u4ed6\u6587\u4ef6\u7cfb\u7edf\uff0c\u5219\u540e\u7eed\u901a\u8fc7\u811a\u672c\u6216\u547d\u4ee4\u4f5c\u4e3a\u5b50\u6587\u4ef6\u7cfb\u7edf\u5b89\u88c5\u5728\u5df2\u5b89\u88c5\u6587\u4ef6\u7cfb\u7edf\u7684\u76ee\u5f55\u4e0a\uff0c\u6700\u7ec8\u5f62\u6210\u6574\u4e2a\u76ee\u5f55\u6811\u3002<\/span><\/p>\n<pre>start_kernel&nbsp;\u3000\u3000vfs_caches_init&nbsp;\u3000\u3000\u3000\u3000mnt_init&nbsp;\u3000\u3000\u3000\u3000\u3000\u3000init_rootfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u6ce8\u518crootfs\u6587\u4ef6\u7cfb\u7edf\u3000\u3000\u3000\u3000\u3000\u3000init_mount_tree&nbsp;\/\/&nbsp;\u6302\u8f7drootfs\u6587\u4ef6\u7cfb\u7edf&nbsp;\u3000\u3000\u2026&nbsp;\u3000\u3000rest_init&nbsp;\u3000\u3000kernel_thread(kernel_init,&nbsp;NULL,&nbsp;CLONE_FS);<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236<br \/>\n<br \/> <br \/>\n<span style=\"font-size: 15px\">\u5c31\u5355\u4e2a\u6587\u4ef6\u7cfb\u7edf\u800c\u8a00\uff0c\u5728\u6587\u4ef6\u7cfb\u7edf\u5b89\u88c5\u65f6\uff0c\u521b\u5efa\u8d85\u7ea7\u5757\u5bf9\u8c61\uff1b\u6cbf\u6811\u67e5\u627e\u6587\u4ef6\u65f6\uff0c\u603b\u662f\u9996\u5148\u4ece\u521d\u8bc6\u76ee\u5f55\u7684\u4e2d\u67e5\u627e\u5339\u914d\u7684\u76ee\u5f55\u9879\uff0c\u4ee5\u4fbf\u83b7\u53d6\u76f8\u5e94\u7684\u7d22\u5f15\u8282\u70b9\uff0c\u7136\u540e\u8bfb\u53d6\u7d22\u5f15\u8282\u70b9\u7684\u76ee\u5f55\u6587\u4ef6\uff0c\u8f6c\u5316\u4e3adentry\u5bf9\u8c61\uff0c\u518d\u68c0\u67e5\u5339\u914d\u7684\u76ee\u5f55\u9879\uff0c\u53cd\u590d\u6267\u884c\u4ee5\u4e0a\u8fc7\u7a0b\uff0c\u76f4\u81f3\u627e\u5230\u5bf9\u5e94\u7684\u6587\u4ef6\u7684\u7d22\u5f15\u8282\u70b9\uff0c\u5e76\u521b\u5efa\u7d22\u5f15\u8282\u70b9\u5bf9\u8c61\u3002<\/span>  <\/p>\n<h3><span style=\"font-size: 16px\">\u8f6f\u94fe\u63a5 vs \u786c\u94fe\u63a5<\/span><\/h3>\n<p><span style=\"font-size: 15px\">\u8f6f\u94fe\u63a5\u662f\u4e00\u4e2a\u666e\u901a\u7684\u6587\u4ef6\uff0c\u5176\u4e2d\u5b58\u653e\u7684\u662f\u53e6\u5916\u4e00\u4e2a\u6587\u4ef6\u7684\u8def\u5f84\u540d\u3002\u786c\u94fe\u63a5\u5219\u6307\u5411\u540c\u4e00\u4e2a\u7d22\u5f15\u8282\u70b9\uff0c\u786c\u94fe\u63a5\u6570\u8bb0\u5f55\u5728\u7d22\u5f15\u8282\u70b9\u5bf9\u8c61\u7684 i_nlink \u5b57\u6bb5\u3002\u5f53<\/span><br \/>\n<span style=\"font-size: 15px\">i_nlink<\/span><br \/>\n<span style=\"font-size: 15px\">\u5b57\u6bb5\u4e3a\u96f6\u65f6\uff0c\u8bf4\u660e\u6ca1\u6709\u786c\u94fe\u63a5\u6307\u5411\u8be5\u6587\u4ef6\u3002<\/span>  <\/p>\n<h3><span style=\"font-size: inherit;color: inherit;line-height: inherit\">\u6587\u4ef6 &amp; \u8fdb\u7a0b\u7ba1\u7406<\/span><\/h3>\n<p><span style=\"font-size: 15px\">\u4e0b\u56fe\u662f\u4e00\u4e2a\u7b80\u5355\u793a\u4f8b\uff0c\u8bf4\u660e\u8fdb\u7a0b\u662f\u600e\u6837\u4e0e\u6587\u4ef6\u8fdb\u884c\u4ea4\u4e92\u3002\u4e09\u4e2a\u4e0d\u540c\u8fdb\u7a0b\u6253\u5f00\u540c\u4e00\u4e2a\u6587\u4ef6\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u6709\u81ea\u5df1\u7684\u6587\u4ef6\u5bf9\u8c61\uff0c\u5176\u4e2d\u4e24\u4e2a\u8fdb\u7a0b\u4f7f\u7528\u540c\u4e00\u4e2a\u786c\u94fe\u63a5\uff08\u6bcf\u4e2a\u786c\u94fe\u63a5\u5bf9\u5e94\u4e00\u4e2a\u76ee\u5f55\u5bf9\u8c61\uff09\uff0c\u4e24\u4e2a\u76ee\u5f55\u9879\u5bf9\u8c61\u90fd\u6307\u5411\u540c\u4e00\u4e2a \u7d22\u5f15\u8282\u70b9\u5bf9\u8c61\u3002<\/span>  <\/p>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/275\/013\/858ab9bccc9a6978ce3553cc1d738642-1.png\" class=\"aligncenter\" title=\"\u4ece lsof \u5f00\u59cb\uff0c\u6df1\u5165\u7406\u89e3 Linux \u865a\u62df\u6587\u4ef6\u7cfb\u7edf\u63d2\u56fe1\" alt=\"\u4ece lsof \u5f00\u59cb\uff0c\u6df1\u5165\u7406\u89e3 Linux \u865a\u62df\u6587\u4ef6\u7cfb\u7edf\u63d2\u56fe1\" \/><\/p>\n<p><span style=\"font-size: 15px\">\u7d22\u5f15\u8282\u70b9\u7684\u6570\u636e\u53c8\u7531\u4e24\u90e8\u5206\u7ec4\u6210\uff1a\u5185\u5b58\u6570\u636e\u548c\u78c1\u76d8\u6570\u636e\u3002Linux \u4f7f\u7528 Write back \u4f5c\u4e3a\u7d22\u5f15\u8282\u70b9\u7684\u6570\u636e\u4e00\u81f4\u6027\u7b56\u7565\u3002\u5bf9\u4e8e\u7d22\u5f15\u8282\u70b9\u7684\u6570\u636e\uff0c\u5f53\u6587\u4ef6\u88ab\u6253\u5f00\u65f6\uff0c\u624d\u4f1a\u52a0\u8f7d\u7d22\u5f15\u8282\u70b9\u5230\u5185\u5b58\uff1b\u5f53\u4e0d\u518d\u88ab\u8fdb\u7a0b\u4f7f\u7528\uff0c\u5219\u4ece\u5185\u5b58\u8e22\u51fa\uff1b\u5982\u679c\u4e2d\u95f4\u6709\u66f4\u65b0\uff0c\u5219\u9700\u8981\u628a\u6570\u636e\u5199\u56de\u78c1\u76d8\u3002<\/span>   <\/p>\n<pre>*&nbsp;&nbsp;\"in_use\"&nbsp;-&nbsp;valid&nbsp;inode,&nbsp;i_count&nbsp;&amp;gt;&nbsp;0,&nbsp;i_nlink&nbsp;&amp;gt;&nbsp;0*&nbsp;&nbsp;\"dirty\"&nbsp;&nbsp;-&nbsp;as&nbsp;\"in_use\"&nbsp;but&nbsp;also&nbsp;dirty*&nbsp;&nbsp;\"unused\"&nbsp;-&nbsp;valid&nbsp;inode,&nbsp;i_count&nbsp;=&nbsp;0<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236<br \/>\n<br \/> <br \/>\n<span style=\"font-size: 15px\">\u7d22\u5f15\u8282\u70b9\u662f\u5426\u4ecd\u5728\u4f7f\u7528\uff0c\u662f\u901a\u8fc7&nbsp;<\/span><br \/>\n<span style=\"font-size: 15px\">open()<\/span><br \/>\n<span style=\"font-size: 15px\">&nbsp;\u548c&nbsp;<\/span><br \/>\n<span style=\"font-size: 15px\">close()<\/span><br \/>\n<span style=\"font-size: 15px\">&nbsp;\u64cd\u4f5c\u5efa\u7acb\u548c\u9500\u6bc1\u6587\u4ef6\u5bf9\u8c61\uff0c\u6587\u4ef6\u5bf9\u8c61\u901a\u8fc7\u7d22\u5f15\u8282\u70b9\u63d0\u4f9b\u7684&nbsp;<\/span><br \/>\n<span style=\"font-size: 15px\">iget<\/span><br \/>\n<span style=\"font-size: 15px\">&nbsp;\u548c&nbsp;<\/span><br \/>\n<span style=\"font-size: 15px\">iput<\/span><br \/>\n<span style=\"font-size: 15px\">&nbsp;&nbsp;\u66f4\u65b0\u7d22\u5f15\u8282\u70b9\u7684i_count\u5b57\u6bb5\uff0c\u4ee5\u5b8c\u6210\u4f7f\u7528\u8ba1\u6570\u3002open \u64cd\u4f5c\u4f7f\u5f97 i_count \u52a0\u4e00\uff0c close \u64cd\u4f5c\u4f7f\u5f97 i_count \u51cf\u4e00\u3002\u5728 close \u64cd\u4f5c\u65f6\u5224\u65ad\u7d22\u5f15\u8282\u70b9\u662f\u5426\u91ca\u653e\uff0c\u5982\u679c i_count = 0\uff0c\u5219\u610f\u5473\u7740\u4e0d\u518d\u6709\u8fdb\u7a0b\u5f15\u7528\uff0c\u5c06\u4f1a\u4ece\u5185\u5b58\u91ca\u653e\u3002<\/span>  <\/p>\n<h3><span style=\"font-size: inherit;color: inherit;line-height: inherit\">\u6587\u4ef6 &amp; \u78c1\u76d8\u7ba1\u7406<\/span><\/h3>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><span style=\"font-size: 15px\">\u6587\u4ef6\u4e0e\u78c1\u76d8\u7ba1\u7406\u8054\u7cfb\u6700\u7d27\u5bc6\u7684\u64cd\u4f5c\uff0c\u83ab\u8fc7\u4e8e<\/span><span style=\"font-size: 15px\">touch<\/span><span style=\"font-size: 15px\">\u548c<\/span><span style=\"font-size: 15px\">rm<\/span><span style=\"font-size: 15px\">\u64cd\u4f5c\uff0c\u800c\u5c24\u4ee5\u540e\u8005\u6700\u4e3a\u5173\u952e\u3002\u901a\u8fc7strace(\u6216 dtruss)\uff0c\u67e5\u770b rm \u7684\u5b9e\u9645\u7684\u7cfb\u7edf\u8c03\u7528<\/span><\/p>\n<pre>#&nbsp;dtruss&nbsp;rm&nbsp;tmp...geteuid(0x0,&nbsp;0x0,&nbsp;0x0)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=&nbsp;0&nbsp;0ioctl(0x0,&nbsp;0x4004667A,&nbsp;0x7FFEE06F09C4)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=&nbsp;0&nbsp;0lstat64(\"tmp\u0000\",&nbsp;0x7FFEE06F0968,&nbsp;0x0)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=&nbsp;0&nbsp;0access(\"tmp\u0000\",&nbsp;0x2,&nbsp;0x0)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=&nbsp;0&nbsp;0unlink(\"tmp\u0000\",&nbsp;0x0,&nbsp;0x0)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=&nbsp;0&nbsp;0<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p style=\"margin-top: 1.5em;margin-bottom: 1.5em;letter-spacing: 0.544px;font-size: 16px;line-height: inherit;font-family:\"><span style=\"font-size: 15px\">\u53ef\u4ee5\u53d1\u73b0 rm \u5b9e\u9645\u662f\u901a\u8fc7 unlink \u5b8c\u6210\u7684\u3002unlink\u4ee3\u8868\u5220\u9664\u76ee\u5f55\u9879\uff0c\u4ee5\u53ca\u51cf\u5c11\u5176\u7d22\u5f15\u8282\u70b9\u7684\u8ba1\u6570\u3002\u7531\u901a\u7528\u6587\u4ef6\u6a21\u578b\u53ef\u77e5\uff0c\u7236\u76ee\u5f55\u672c\u8eab\u540c\u6837\u662f\u4e00\u4e2a\u6587\u4ef6\uff0c\u4e5f\u5c31\u610f\u5473\u7740\u76ee\u5f55\u9879\u662f\u5176\u6587\u4ef6\u6570\u636e\u7684\u4e00\u90e8\u5206\u3002\u5220\u9664\u76ee\u5f55\u9879\u7b49\u4ef7\u4e8e\u4ece\u7236\u76ee\u5f55\u7684\u6587\u4ef6\u4e2d\u5220\u9664\u6570\u636e\uff0c\u4e5f\u5c31\u610f\u5473\u7740\u9996\u5148\u8981\u6253\u5f00\u7236\u76ee\u5f55\u7684\u6587\u4ef6\u3002\u90a3\u4e48\uff0c\u5220\u9664\u64cd\u4f5c\u5373\u53ef\u7406\u89e3\u4e3a\uff1a<\/span><\/p>\n<ol>\n<li>\n<p style=\"line-height: 1.75em;text-align: left\">\u5220\u9664\u547d\u4ee4\uff08\u4e00\u4e2a\u8fdb\u7a0b\uff09\u4f7f\u7528 open \u64cd\u4f5c\u83b7\u5f97\u7236\u76ee\u5f55\u6587\u4ef6\u5bf9\u8c61<\/p>\n<\/li>\n<li>\n<p style=\"line-height: 1.75em;text-align: left\"><span style=\"font-size: 15px\">\u901a\u8fc7&nbsp;<\/span><span style=\"font-size: 15px\">iget<\/span><span style=\"font-size: 15px\">&nbsp;\u589e\u52a0 \u76ee\u5f55\u6587\u4ef6\u7684\u7d22\u5f15\u8282\u70b9\u5bf9\u8c61\u8ba1\u6570<\/span><\/p>\n<\/li>\n<li>\n<p style=\"line-height: 1.75em;text-align: left\"><span style=\"font-size: 15px\">\u8bfb\u53d6\u76ee\u5f55\u6587\u4ef6\u6570\u636e<\/span><\/p>\n<\/li>\n<\/ol>\n<ul>\n<li>\n<p style=\"line-height: 1.75em;text-align: left\">\u5c06\u76ee\u5f55\u6587\u4ef6\u6570\u636e\u8f6c\u5316\u4e3a\u76ee\u5f55\u9879\u5bf9\u8c61<\/p>\n<\/li>\n<li>\n<p style=\"line-height: 1.75em;text-align: left\">\u7531\u4e8e\u76ee\u5f55\u9879\u5305\u542b\u6587\u4ef6\u7684\u7d22\u5f15\u8282\u70b9\uff0c\u7c7b\u4f3c\u7684\uff0c\u9700\u8981\u901a\u8fc7 iget \u589e\u52a0\u6587\u4ef6\u7684\u7d22\u5f15\u8282\u70b9\u5bf9\u8c61\u8ba1\u6570<\/p>\n<\/li>\n<li>\n<p style=\"line-height: 1.75em;text-align: left\">\u5220\u9664\u76ee\u5f55\u7684\u76ee\u5f55\u9879<\/p>\n<\/li>\n<li>\n<p style=\"line-height: 1.75em;text-align: left\">\u51cf\u5c11\u6587\u4ef6\u7d22\u5f15\u8282\u70b9\u5bf9\u8c61\u7684\u786c\u94fe\u63a5\u8ba1\u6570i_nlink<\/p>\n<\/li>\n<li>\n<p style=\"line-height: 1.75em;text-align: left\"><span style=\"font-size: 15px\">\u901a\u8fc7&nbsp;<\/span><span style=\"font-size: 15px\">iput<\/span><span style=\"font-size: 15px\">&nbsp;\u7ed3\u675f\u5bf9\u6587\u4ef6\u7d22\u5f15\u8282\u70b9\u5bf9\u8c61\u7684\u64cd\u4f5c\uff0c\u4f7f\u7528\u8ba1\u6570 i_count \u51cf\u4e00<\/span><\/p>\n<\/li>\n<ul>\n<li>\n<p style=\"line-height: 1.75em;text-align: left\">\u5224\u65adi_count\u662f\u5426\u4e3a\u96f6\uff0c\u5982\u679c\u4e3a\u96f6\uff0c\u5219\u91ca\u653e\u5185\u5b58<\/p>\n<\/li>\n<li>\n<p style=\"line-height: 1.75em;text-align: left\">\u7136\u540e\uff0c\u5224\u65adi_nlink\u662f\u5426\u4e3a\u96f6\uff0c\u5982\u679c\u4e3a\u96f6\uff0c\u5219\u91ca\u653e\u78c1\u76d8\u7a7a\u95f4<\/p>\n<\/li>\n<\/ul>\n<li>\n<p style=\"line-height: 1.75em;text-align: left\">\u901a\u8fc7 iput \u7ed3\u675f\u5bf9\u76ee\u5f55\u7d22\u5f15\u8282\u70b9\u5bf9\u8c61\u7684\u64cd\u4f5c\u3002<\/p>\n<\/li>\n<h3><span style=\"font-size: inherit;color: inherit;line-height: inherit\">\u603b\u7ed3<\/span><\/h3>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><span style=\"font-size: 15px\">\u56de\u5934\u6765\u770b\u9047\u5230\u7684\u95ee\u9898\uff0c\u5176\u5b9e\u53ef\u4ee5\u4ece\u4e24\u4e2a\u89d2\u5ea6\u6765\u7406\u89e3\uff1a<\/span><\/p>\n<h3><span style=\"font-size: 16px\">\u7d22\u5f15\u4e0e\u6570\u636e<\/span><\/h3>\n<p> <span style=\"font-size: 15px\">\u6587\u4ef6\u7cfb\u7edf\u4e0e\u6587\u4ef6\u3001\u78c1\u76d8\u7ba1\u7406\u4e0e\u6587\u4ef6\u3001\u8fdb\u7a0b\u7ba1\u7406\u4e0e\u6587\u4ef6\uff0c\u6700\u6838\u5fc3\u7684\u90fd\u662f\u6587\u4ef6\u7684\u7d22\u5f15\uff0c\u800c\u4e0d\u662f\u6587\u4ef6\u7684\u6570\u636e\u3002\u628a\u6570\u636e\u548c\u7d22\u5f15\u5206\u5f00\u662f\u7406\u89e3\u6587\u4ef6\u7cfb\u7edf\u7684\u5173\u952e\u3002<\/span>  <\/p>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><\/p>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/275\/013\/858ab9bccc9a6978ce3553cc1d738642-2.png\" class=\"aligncenter\" title=\"\u4ece lsof \u5f00\u59cb\uff0c\u6df1\u5165\u7406\u89e3 Linux \u865a\u62df\u6587\u4ef6\u7cfb\u7edf\u63d2\u56fe2\" alt=\"\u4ece lsof \u5f00\u59cb\uff0c\u6df1\u5165\u7406\u89e3 Linux \u865a\u62df\u6587\u4ef6\u7cfb\u7edf\u63d2\u56fe2\" \/><\/p>\n<h3><span style=\"font-size: 16px\">\u7f13\u5b58\u7b56\u7565<\/span><\/h3>\n<p style=\"font-family: -apple-system-font, BlinkMacSystemFont,\"><span style=\"font-size: 15px\">\u7531\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u4f7f\u7528 Write back \u7684\u7b56\u7565\uff0c\u610f\u5473\u7740\u53ea\u6709\u5148\u91ca\u653e\u5185\u5b58\uff0c\u624d\u6709\u53ef\u80fd\u91ca\u653e\u78c1\u76d8\u3002<\/span><\/p>\n<h3><span style=\"font-size: 16px\">Why lsof ?<\/span><\/h3>\n<p> <span style=\"font-size: 15px\">\u4ece\u4e0a\u9762\u7684\u6a21\u578b\u53ef\u4ee5\u5f88\u6e05\u695a\u7684\u7406\u89e3\uff0c\u56e0\u4e3a\u76ee\u5f55\u5df2\u7ecf\u6ca1\u6709\u7d22\u5f15\u5230\u6587\u4ef6\u4e86\uff0c\u4f46\u662f\u6253\u5f00\u6587\u4ef6\u8fd8\u6709\u7d22\u5f15\u5230\u6587\u4ef6\uff0c\u6240\u4ee5\u4e0d\u80fd\u7acb\u523b\u91ca\u653e\u78c1\u76d8\u7a7a\u95f4\u3002<\/span><br \/>\n <span style=\"font-size: 15px\">\u4e3a\u4ec0\u4e48 lsof \u53ef\u4ee5\u627e\u5230\u5df2\u5220\u9664\u672a\u91ca\u653e\u7684\u6587\u4ef6\u5462\uff1f<\/span><br \/>\n <span style=\"font-size: 15px\">lsof\uff0c\u987e\u540d\u601d\u4e49\uff1alist open files\uff0c\u8be5\u547d\u4ee4\u7684\u539f\u7406\u5c31\u662f\u67e5\u627e\u6253\u5f00\u6587\u4ef6\u7684\u5217\u8868\uff0c\u56e0\u6b64\u53ef\u4ee5\u627e\u5230\u5df2\u5220\u9664\u672a\u91ca\u653e\u7684\u6587\u4ef6\u3002<\/span>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662f\u4ece lsof \u5f00\u59cb\uff0c\u6df1\u5165\u7406\u89e3 Linux \u865a\u62df\u6587\u4ef6\u7cfb\u7edf\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u80cc\u666f \u6709\u65f6\u4f1a\u51fa\u73b0\u8fd9\u6837\u7684\u60c5\u51b5\uff0c\u78c1\u76d8\u7a7a\u95f4\u663e\u793a\u5df2\u7ecf\u88ab\u5360\u6ee1\uff0c\u4f46\u662f\u5728\u67e5\u770b\u78c1\u76d8\u7684\u5177\u4f53\u6587\u4ef6\u5360\u7528\u60c5\u51b5\u65f6\uff0c\u53d1\u73b0\u78c1\u76d8\u4ecd\u7136\u6709\u5f88\u5927\u7684\u7a7a\u4f59\u7a7a\u95f4\u3002 1.\u6267\u884c df \u547d\u4ee4\u67e5\u770b\u78c1\u76d8\u4f7f\u7528\u60c5\u51b5\uff0c\u53d1\u73b0\u78c1\u76d8\u5df2\u7ecf\u6ee1\u4e86\u3002 -bash-4.2$&nbsp;df&nbsp;-ThFilesystem&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Type&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Size&nbsp;&nbsp;Used&nbsp;Avail&nbsp;Use%&nbsp;Mounted&nbsp;on\/dev\/vda1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ext4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;30G&nbsp;&nbsp;&nbsp;&nbsp;30G&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;100%&nbsp;\/devtmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;devtmpfs&nbsp;&nbsp;489M&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;489M&nbsp;&nbsp;&nbsp;0%&nbsp;\/devtmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;tmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;497M&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;497M&nbsp;&nbsp;&nbsp;0%&nbsp;\/dev\/shmtmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;tmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;497M&nbsp;&nbsp;&nbsp;50M&nbsp;&nbsp;447M&nbsp;&nbsp;11%&nbsp;\/runtmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;tmpfs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;497M&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;497M&nbsp;&nbsp;&nbsp;0%&nbsp;\/sys\/fs\/cgroup \u767b\u5f55\u540e\u590d\u5236 2.\u6267\u884c du \u547d\u4ee4\u67e5\u770b\u5404\u4e2a\u76ee\u5f55\u7684\u78c1\u76d8\u5360\u7528\u60c5\u51b5\uff0c\u628a\u5404\u4e2a\u76ee\u5f55\u6587\u4ef6\u7684\u5927\u5c0f\u76f8\u52a0\uff0c\u53d1\u73b0\u5e76\u6ca1\u6709\u5360\u6ee1\u78c1\u76d8\uff0c\u670910\u591aG\u7a7a\u95f4\u83ab\u540d\u5931\u8e2a\u3002 -bash-4.2$&nbsp;du&nbsp;-h&nbsp;&#8211;max-depth=1&nbsp;\/home16M&nbsp;&nbsp;&nbsp;&nbsp;\/home\/logs11G&nbsp;&nbsp;&nbsp;&nbsp;\/home\/serverdog11G&nbsp;&nbsp;&nbsp;&nbsp;\/home \u767b\u5f55\u540e\u590d\u5236 3.\u4e3a\u4f55\u4f1a\u51fa\u73b0\u8fd9\u6837\u7684\u60c5\u51b5\u5462\uff1f \u56e0\u4e3a\u867d\u7136\u6587\u4ef6\u5df2\u88ab\u5220\u9664\uff0c\u4f46\u662f\u4e00\u4e9b\u8fdb\u7a0b\u4ecd\u7136\u6253\u5f00\u8fd9\u4e9b\u6587\u4ef6\uff0c\u56e0\u6b64\u5176\u5360\u7528\u7684\u78c1\u76d8\u7a7a\u95f4\u5e76\u6ca1\u6709\u88ab\u91ca\u653e\u3002\u6267\u884c lsof &nbsp;\u547d\u4ee4\u663e\u793a\u6253\u5f00\u5df2\u5220\u9664\u7684\u6587\u4ef6\u3002\u5c06\u6709\u95ee\u9898\u7684\u8fdb\u7a0b\u91cd\u542f\uff08\u6216\uff0c\u6e05\u7a7a\uff09\uff0c\u78c1\u76d8\u7a7a\u95f4\u5c31\u4f1a\u5f97\u5230\u91ca\u653e\u3002 -bash-4.2#&nbsp;lsof&nbsp;|&nbsp;grep&nbsp;deletemysqld&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2470&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mysql&nbsp;&nbsp;&nbsp;&nbsp;4u&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;REG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;253,1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;523577&nbsp;\/var\/tmp\/ibfTeQFn&nbsp;(deleted)mysqld&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2470&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mysql&nbsp;&nbsp;&nbsp;&nbsp;5u&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;REG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;253,1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;523579&nbsp;\/var\/tmp\/ibaHcIdW&nbsp;(deleted)mysqld&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2470&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mysql&nbsp;&nbsp;&nbsp;&nbsp;6u&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;REG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;253,1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;523581&nbsp;\/var\/tmp\/ibLjiALu&nbsp;(deleted)mysqld&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2470&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mysql&nbsp;&nbsp;&nbsp;&nbsp;7u&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;REG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;253,1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;523585&nbsp;\/var\/tmp\/ibCFnzTB&nbsp;(deleted)mysqld&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2470&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mysql&nbsp;&nbsp;&nbsp;11u&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;REG&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;253,1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;523587&nbsp;\/var\/tmp\/ibCjuqva&nbsp;(deleted) \u767b\u5f55\u540e\u590d\u5236 \u90a3\u4e48\uff0cLinux \u7684\u6587\u4ef6\u7cfb\u7edf\uff0c\u5230\u5e95\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u8bbe\u8ba1\u5462\uff1f\u8981\u4e86\u89e3\u8fd9\u4e9b\uff0c\u5c31\u8981\u5148\u5f04\u6e05\u695a\u5e76\u4e0d\u5bb9\u6613\uff0c\u4e0b\u9762\u5c06\u4ece\u4e00\u4e9b\u57fa\u672c\u6982\u5ff5\u5165\u624b\uff0c\u4e00\u6b65\u6b65\u5c06\u8fd9\u4e9b\u68b3\u7406\u6e05\u695a\uff1a \u4ec0\u4e48\u662f\u865a\u62df\u6587\u4ef6\u7cfb\u7edf\uff08VFS\uff1avirtual filesystem\uff09\uff1f \u4ec0\u4e48\u662f\u901a\u7528\u6587\u4ef6\u6a21\u578b\uff1f \u8d85\u7ea7\u5757\u5bf9\u8c61\uff08superblock object\uff09 \u7d22\u5f15\u8282\u70b9\u5bf9\u8c61\uff08inode object\uff09 \u6587\u4ef6\u5bf9\u8c61\uff08file object\uff09 \u76ee\u5f55\u9879\u5bf9\u8c61\uff08dentry object\uff09 \u6587\u4ef6\u7684\u6982\u5ff5 \u6587\u4ef6\u7684\u8868\u8fbe \u5185\u5b58\u8868\u8fbe \u78c1\u76d8\u8868\u8fbe \u76ee\u5f55\u6811\u7684\u6784\u5efa \u8f6f\u94fe\u63a5 vs \u786c\u94fe\u63a5 \u6587\u4ef6 &amp; \u78c1\u76d8\u7ba1\u7406 \u7d22\u5f15\u8282\u70b9\u72b6\u6001 \u6587\u4ef6 &amp; \u8fdb\u7a0b\u7ba1\u7406 \u64cd\u4f5c\uff1a \u6253\u5f00&amp;\u5220\u9664 \u865a\u62df\u6587\u4ef6\u7cfb\u7edf\uff08virtual filesystem\uff09 \u4e0b\u56fe\u663e\u793a\u4e86 Linux \u64cd\u4f5c\u7cfb\u7edf\u4e2d\u8d1f\u8d23\u6587\u4ef6\u7ba1\u7406\u7684\u57fa\u672c\u7ec4\u4ef6\u3002\u4e0a\u534a\u533a\u57df\u4e3a\u7528\u6237\u6a21\u5f0f\uff0c\u4e0b\u534a\u533a\u57df\u4e3a\u5185\u6838\u6a21\u5f0f\u3002\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528\u6807\u51c6\u5e93libc\u6765\u8bbf\u95ee\u6587\u4ef6\uff0c\u5e93\u5c06\u8bf7\u6c42\u6620\u5c04\u5230\u7cfb\u7edf\u8c03\u7528\uff0c\u4ee5\u4fbf\u8fdb\u5165\u5185\u6838\u6a21\u5f0f\u3002 \u6240\u6709\u4e0e\u6587\u4ef6\u76f8\u5173\u7684\u64cd\u4f5c\u7684\u5165\u53e3\u90fd\u662f\u865a\u62df\u6587\u4ef6\u7cfb\u7edf\uff08VFS\uff09\uff0c\u800c\u975e\u7279\u5b9a\u7684\u989d\u6587\u4ef6\u7cfb\u7edf\uff08\u5982Ext3\u3001ReiserFS\u548cNFS\uff09\u3002VFS \u63d0\u4f9b\u4e86\u7cfb\u7edf\u5e93\u548c\u7279\u5b9a\u6587\u4ef6\u7cfb\u7edf\u4e4b\u95f4\u7684\u63a5\u53e3\u3002\u56e0\u6b64\uff0cVFS [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-16690","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/16690","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=16690"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/16690\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=16690"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=16690"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=16690"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}