{"id":308130,"date":"2024-05-20T20:54:00","date_gmt":"2024-05-20T12:54:00","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/308130.html"},"modified":"2024-05-20T20:54:16","modified_gmt":"2024-05-20T12:54:16","slug":"shell-%e7%bc%96%e7%a8%8b-temp_file-tmp-cdb-%e5%90%8e%e9%9d%a2%e7%9a%84-%e6%9c%89%e4%bb%80%e4%b9%88%e7%94%a8","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/308130.html","title":{"rendered":"Shell \u7f16\u7a0b temp_file=\\\/tmp\/cdb.$\\ \u540e\u9762\u7684 $ \u6709\u4ec0\u4e48\u7528"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/26224502\/c87fd47b-a1d4-4abe-82e2-e043b88bf3bb.webp\" alt=\"Shell \u7f16\u7a0b temp_file=\\\/tmp\/cdb.$\\ \u540e\u9762\u7684 $ \u6709\u4ec0\u4e48\u7528\" \/><\/p>\n<p><p>\u5728Shell\u7f16\u7a0b\u4e2d\uff0c<code>temp_file=\/tmp\/cdb.$<\/code>\u540e\u9762\u7684<code>$<\/code>\u901a\u5e38\u662f\u7528\u6765\u5f15\u7528\u53d8\u91cf\u7684\uff0c\u4f46\u662f\u5982\u679c\u4ec5\u4ec5\u662f<code>$<\/code>\u540e\u9762\u6ca1\u6709\u8ddf\u4efb\u4f55\u5b57\u7b26\u6216\u8005\u53d8\u91cf\u540d\uff0c\u8fd9\u4e2a\u8bed\u53e5\u5c31\u663e\u5f97\u4e0d\u5408\u9002\u6216\u8005\u8bf4\u662f\u4e0d\u5b8c\u5168\u7684\u3002<strong>\u6b63\u786e\u7684\u505a\u6cd5\u5e94\u8be5\u662f\u5728<code>$<\/code>\u540e\u9762\u7d27\u8ddf\u4e00\u4e2a\u53d8\u91cf\u540d\u6216\u8005\u7279\u6b8a\u53d8\u91cf<\/strong>\uff08\u5982<code>$RANDOM<\/code>\u3001<code>$$<\/code>\u7b49\uff09\uff0c\u8fd9\u6837\u624d\u80fd\u4f7f\u5f97\u811a\u672c\u610f\u56fe\u660e\u786e\u3001\u529f\u80fd\u5b8c\u6574\u3002\u4ee5<code>temp_file=\/tmp\/cdb.$$<\/code>\u4e3a\u4f8b\uff0c\u5176\u4e2d\u7684<code>$$<\/code>\u4ee3\u8868\u5f53\u524dShell\u8fdb\u7a0b\u7684\u8fdb\u7a0bID\uff08PID\uff09\uff0c\u8fd9\u6837\u505a\u53ef\u4ee5\u4fdd\u8bc1<code>temp_file<\/code>\u7684\u552f\u4e00\u6027\uff0c\u907f\u514d\u591a\u4e2a\u5b9e\u4f8b\u540c\u65f6\u8fd0\u884c\u65f6\u76f8\u4e92\u5e72\u6270\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u53d8\u91cf\u5f15\u7528\u7684\u57fa\u672c\u6982\u5ff5<\/h3>\n<\/p>\n<p><p>\u5728Shell\u811a\u672c\u4e2d\uff0c\u53d8\u91cf\u662f\u4e00\u5757\u7528\u4e8e\u5b58\u50a8\u6570\u636e\u7684\u5185\u5b58\u7a7a\u95f4\u7684\u8868\u793a\u3002\u53d8\u91cf\u540d\u524d\u9762\u52a0\u4e0a<code>$<\/code>\u7b26\u53f7\u8868\u793a\u53d6\u51fa\u5176\u5b58\u50a8\u7684\u503c\u3002\u56e0\u6b64\uff0c\u5982\u679c\u770b\u5230\u4e00\u4e2a<code>$<\/code>\u540e\u9762\u7d27\u8ddf\u53d8\u91cf\u540d\u7684\u7528\u6cd5\uff0c\u8fd9\u662fShell\u811a\u672c\u4e2d\u6700\u5e38\u89c1\u7684\u4e00\u4e2a\u7528\u6cd5\uff0c\u7528\u4ee5\u83b7\u53d6\u8be5\u53d8\u91cf\u7684\u5f53\u524d\u503c\u3002<\/p>\n<\/p>\n<p><h4>\u53d8\u91cf\u7684\u5b9a\u4e49\u548c\u5f15\u7528<\/h4>\n<\/p>\n<p><p>\u5b9a\u4e49\u53d8\u91cf\u65f6\uff0c\u76f4\u63a5\u5199\u53d8\u91cf\u540d\u5e76\u8d4b\u503c\u5373\u53ef\uff0c\u5982<code>number=1<\/code>\u8868\u793a\u5b9a\u4e49\u4e00\u4e2a\u540d\u4e3a<code>number<\/code>\u7684\u53d8\u91cf\uff0c\u5176\u503c\u4e3a1\u3002\u800c\u5f15\u7528\u53d8\u91cf\u65f6\uff0c\u5219\u9700\u8981\u5728\u53d8\u91cf\u540d\u524d\u52a0\u4e0a<code>$<\/code>\u7b26\u53f7\uff0c\u5982<code>echo $number<\/code>\u4f1a\u8f93\u51fa1\u3002<\/p>\n<\/p>\n<p><h4>\u7279\u6b8a\u53d8\u91cf\u793a\u4f8b<\/h4>\n<\/p>\n<p><p>Shell\u7f16\u7a0b\u4e2d\u6709\u4e00\u4e9b\u7279\u6b8a\u53d8\u91cf\uff0c\u5b83\u4eec\u88ab\u8d4b\u4e88\u4e86\u7279\u5b9a\u7684\u542b\u4e49\u3002\u6bd4\u5982<code>$$<\/code>\u8868\u793a\u5f53\u524dShell\u8fdb\u7a0b\u7684PID\uff0c<code>$?<\/code>\u8868\u793a\u4e0a\u4e00\u4e2a\u547d\u4ee4\u7684\u9000\u51fa\u72b6\u6001\uff0c<code>$0<\/code>\u8868\u793a\u5f53\u524d\u811a\u672c\u7684\u540d\u79f0\uff0c<code>$#<\/code>\u8868\u793a\u4f20\u7ed9\u811a\u672c\u7684\u53c2\u6570\u4e2a\u6570\u7b49\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u6587\u4ef6\u540d\u552f\u4e00\u6027\u7684\u91cd\u8981\u6027<\/h3>\n<\/p>\n<p><p>\u5728\u7f16\u5199\u811a\u672c\u65f6\uff0c\u7ecf\u5e38\u9700\u8981\u521b\u5efa\u4e34\u65f6\u6587\u4ef6\u6216\u8005\u9501\u6587\u4ef6\u6765\u4fdd\u5b58\u4e2d\u95f4\u6570\u636e\u6216\u8005\u9632\u6b62\u811a\u672c\u5e76\u53d1\u6267\u884c\u3002\u4e3a\u4e86\u9632\u6b62\u6587\u4ef6\u540d\u51b2\u7a81\uff0c\u901a\u5e38\u4f1a\u5229\u7528\u4e00\u4e9b\u552f\u4e00\u6807\u8bc6\u6765\u6784\u9020\u6587\u4ef6\u540d\u3002<\/p>\n<\/p>\n<p><h4>\u4f7f\u7528\u8fdb\u7a0bID\u786e\u4fdd\u552f\u4e00\u6027<\/h4>\n<\/p>\n<p><p>\u5982\u524d\u6240\u8ff0\uff0c<code>temp_file=\/tmp\/cdb.$$<\/code>\u4e2d\u7684<code>$$<\/code>\u662f\u5f53\u524dShell\u8fdb\u7a0b\u7684PID\uff0c\u8fd9\u610f\u5473\u7740\u6bcf\u6b21\u6267\u884c\u811a\u672c\u65f6\uff0c<code>temp_file<\/code>\u90fd\u4f1a\u6839\u636e\u4e0d\u540c\u7684PID\u751f\u6210\u4e0d\u540c\u7684\u6587\u4ef6\u540d\uff0c\u4ece\u800c\u6709\u6548\u907f\u514d\u6587\u4ef6\u540d\u51b2\u7a81\u7684\u95ee\u9898\u3002<\/p>\n<\/p>\n<p><h4>\u5229\u7528\u5176\u4ed6\u65b9\u6cd5\u589e\u5f3a\u552f\u4e00\u6027<\/h4>\n<\/p>\n<p><p>\u9664\u4e86\u4f7f\u7528\u8fdb\u7a0bID\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528\u65e5\u671f\u65f6\u95f4\uff08<code>date<\/code>\u547d\u4ee4\uff09\u3001\u968f\u673a\u6570\uff08<code>$RANDOM<\/code>\u73af\u5883\u53d8\u91cf\uff09\u7b49\u65b9\u5f0f\u6765\u751f\u6210\u66f4\u4e3a\u590d\u6742\u548c\u72ec\u7279\u7684\u6587\u4ef6\u540d\uff0c\u4ee5\u8fdb\u4e00\u6b65\u964d\u4f4e\u6587\u4ef6\u540d\u51b2\u7a81\u7684\u98ce\u9669\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u811a\u672c\u5b9e\u4f8b\u5e94\u7528<\/h3>\n<\/p>\n<p><p>\u5728\u5b9e\u9645\u7684Shell\u811a\u672c\u7f16\u7a0b\u4e2d\uff0c\u6839\u636e\u811a\u672c\u7684\u5177\u4f53\u9700\u6c42\uff0c\u5408\u7406\u5730\u4f7f\u7528\u7279\u6b8a\u53d8\u91cf\u548c\u547d\u540d\u89c4\u5219\u5bf9\u4e8e\u63d0\u9ad8\u811a\u672c\u7684\u5065\u58ef\u6027\u548c\u5b9e\u7528\u6027\u975e\u5e38\u5173\u952e\u3002<\/p>\n<\/p>\n<p><h4>\u5b9e\u73b0\u4e34\u65f6\u6587\u4ef6\u7684\u521b\u5efa\u548c\u7ba1\u7406<\/h4>\n<\/p>\n<p><p>\u901a\u8fc7\u5408\u7406\u5229\u7528<code>$$<\/code>\u3001<code>$RANDOM<\/code>\u7b49\u53d8\u91cf\uff0c\u53ef\u4ee5\u5728\u811a\u672c\u4e2d\u8f7b\u677e\u5730\u521b\u5efa\u548c\u7ba1\u7406\u4e34\u65f6\u6587\u4ef6\uff0c\u5982<code>temp_file=\/tmp\/myfile.$$.$RANDOM<\/code>\u53ef\u4ee5\u751f\u6210\u4e00\u4e2a\u65e2\u5305\u542bPID\u53c8\u5305\u542b\u968f\u673a\u6570\u7684\u6587\u4ef6\u540d\uff0c\u6709\u6548\u907f\u514d\u4e86\u6587\u4ef6\u540d\u51b2\u7a81\u3002<\/p>\n<\/p>\n<p><h4>\u811a\u672c\u5e76\u53d1\u6267\u884c\u7684\u63a7\u5236<\/h4>\n<\/p>\n<p><p>\u5728\u6d89\u53ca\u5230\u811a\u672c\u5e76\u53d1\u6267\u884c\u65f6\uff0c\u53ef\u4ee5\u521b\u5efa\u5305\u542bPID\u7684\u9501\u6587\u4ef6\u4f5c\u4e3a\u6807\u8bc6\uff0c\u5982<code>lock_file=\/var\/run\/myscript.lock.$$<\/code>\uff0c\u901a\u8fc7\u68c0\u67e5\u9501\u6587\u4ef6\u7684\u5b58\u5728\u4e0e\u5426\u6765\u5224\u65ad\u662f\u5426\u6709\u5b9e\u4f8b\u6b63\u5728\u8fd0\u884c\uff0c\u4ece\u800c\u907f\u514d\u5e76\u53d1\u6267\u884c\u5bfc\u81f4\u7684\u6570\u636e\u51b2\u7a81\u95ee\u9898\u3002<\/p>\n<\/p>\n<p><h3>\u56db\u3001\u603b\u7ed3\u4e0e\u6700\u4f73\u5b9e\u8df5<\/h3>\n<\/p>\n<p><p>\u5728Shell\u7f16\u7a0b\u4e2d\uff0c\u5408\u7406\u8fd0\u7528\u7279\u6b8a\u53d8\u91cf\u5982<code>$$<\/code>\u548c\u547d\u540d\u89c4\u5219\uff0c\u5bf9\u4e8e\u7f16\u5199\u80fd\u6709\u6548\u907f\u514d\u51b2\u7a81\u548c\u9519\u8bef\u7684\u811a\u672c\u81f3\u5173\u91cd\u8981\u3002<strong>\u901a\u8fc7\u7cbe\u5fc3\u8bbe\u8ba1\u811a\u672c\u7684\u903b\u8f91\u548c\u4f7f\u7528\u5408\u9002\u7684\u53d8\u91cf<\/strong>\uff0c\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u811a\u672c\u7684\u5065\u58ef\u6027\u3001\u53ef\u9760\u6027\u548c\u5b9e\u7528\u6027\u3002\u6b64\u5916\uff0c\u826f\u597d\u7684\u547d\u540d\u4e60\u60ef\u548c\u7f16\u7801\u89c4\u8303\u4e5f\u662f\u4fdd\u969c\u811a\u672c\u8d28\u91cf\u7684\u5173\u952e\u56e0\u7d20\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>1. Shell \u7f16\u7a0b\u4e2d\uff0c\u4e3a\u4ec0\u4e48\u8981\u5728 temp_file \u53d8\u91cf\u540e\u9762\u6dfb\u52a0 $\uff1f<\/strong><\/p>\n<p>\u6dfb\u52a0 $ \u7b26\u53f7\u662f\u7528\u6765\u83b7\u53d6\u53d8\u91cf\u7684\u503c\u7684\u3002\u5728 Shell \u7f16\u7a0b\u4e2d\uff0c$ \u7b26\u53f7\u53ef\u4ee5\u7528\u6765\u5f15\u7528\u53d8\u91cf\uff0c\u4ee5\u4fbf\u5728\u540e\u7eed\u7684\u4ee3\u7801\u4e2d\u4f7f\u7528\u8be5\u53d8\u91cf\u7684\u503c\u3002\u5728\u8fd9\u4e2a\u7279\u5b9a\u7684\u4f8b\u5b50\u4e2d\uff0ctemp_file=\/tmp\/cdb.$ \u4e2d\u7684 $ \u662f\u7528\u6765\u83b7\u53d6\u53d8\u91cf\u7684\u503c\uff0c\u8be5\u503c\u5c06\u88ab\u66ff\u6362\u4e3a\u5b9e\u9645\u7684\u8fdb\u7a0b ID\u3002<\/p>\n<p><strong>2. \u4e3a\u4ec0\u4e48\u5728 Shell \u7f16\u7a0b\u4e2d\u8981\u4f7f\u7528 temp_file=\/tmp\/cdb.$ \u8fd9\u6837\u7684\u6587\u4ef6\u540d\u683c\u5f0f\uff1f<\/strong><\/p>\n<p>\u8fd9\u79cd\u6587\u4ef6\u540d\u683c\u5f0f\u4ee5\u53d8\u91cf\u4e3a\u524d\u7f00\uff0c\u540e\u9762\u7d27\u8ddf\u7740\u4e00\u4e2a $ \u7b26\u53f7\u3002\u8fd9\u79cd\u683c\u5f0f\u7684\u6587\u4ef6\u540d\u901a\u5e38\u7528\u4e8e\u521b\u5efa\u4e34\u65f6\u6587\u4ef6\uff0c\u7279\u522b\u662f\u5728\u9700\u8981\u4e3a\u6bcf\u4e2a\u8fdb\u7a0b\u521b\u5efa\u552f\u4e00\u6587\u4ef6\u540d\u7684\u60c5\u51b5\u4e0b\u3002\u901a\u8fc7\u5728\u6587\u4ef6\u540d\u4e2d\u5305\u542b\u8fdb\u7a0b ID \uff08PID\uff09\uff0c\u53ef\u4ee5\u786e\u4fdd\u6bcf\u4e2a\u8fdb\u7a0b\u4f7f\u7528\u4e0d\u540c\u7684\u4e34\u65f6\u6587\u4ef6\uff0c\u907f\u514d\u6587\u4ef6\u51b2\u7a81\u548c\u7ade\u4e89\u6761\u4ef6\u3002<\/p>\n<p><strong>3. \u5728 Shell \u7f16\u7a0b\u4e2d\uff0c\u4e3a\u4ec0\u4e48\u8981\u5c06 temp_file \u53d8\u91cf\u8bbe\u7f6e\u4e3a \/tmp\/cdb.$ \u8fd9\u6837\u7684\u8def\u5f84\uff1f<\/strong><\/p>\n<p>\u5728 Shell \u7f16\u7a0b\u4e2d\uff0c\u5c06\u4e34\u65f6\u6587\u4ef6\u5b58\u50a8\u5728 \/tmp \u76ee\u5f55\u4e0b\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u505a\u6cd5\u3002\u8fd9\u662f\u56e0\u4e3a \/tmp \u76ee\u5f55\u662f\u7528\u4e8e\u5b58\u50a8\u4e34\u65f6\u6587\u4ef6\u7684\u6807\u51c6\u76ee\u5f55\uff0c\u53ef\u5728\u591a\u4e2a\u8fdb\u7a0b\u4e4b\u95f4\u5171\u4eab\u3002\u800c cdb.$ \u7684\u547d\u540d\u6a21\u5f0f\u901a\u5e38\u7528\u4e8e\u751f\u6210\u552f\u4e00\u7684\u6587\u4ef6\u540d\uff0c\u4ee5\u9632\u6b62\u591a\u4e2a\u8fdb\u7a0b\u540c\u65f6\u8bbf\u95ee\u548c\u4fee\u6539\u540c\u4e00\u4e2a\u6587\u4ef6\u3002\u901a\u8fc7\u8fd9\u79cd\u8bbe\u7f6e\uff0c\u53ef\u4ee5\u786e\u4fdd\u4e34\u65f6\u6587\u4ef6\u5728\u4f7f\u7528\u540e\u88ab\u6b63\u786e\u6e05\u7406\u548c\u5220\u9664\uff0c\u4ee5\u907f\u514d\u6587\u4ef6\u6269\u5f20\u548c\u8d44\u6e90\u6d6a\u8d39\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Shell\u7f16\u7a0b\u4e2d\uff0ctemp_file=\/tmp\/cdb.$\u540e\u9762\u7684$\u901a\u5e38\u662f\u7528\u6765\u5f15\u7528\u53d8\u91cf\u7684\uff0c\u4f46\u662f\u5982\u679c\u4ec5\u4ec5\u662f$\u540e\u9762 [&hellip;]","protected":false},"author":3,"featured_media":308156,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/308130"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=308130"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/308130\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/308156"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=308130"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=308130"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=308130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}