{"id":123146,"date":"2023-09-11T18:38:07","date_gmt":"2023-09-11T10:38:07","guid":{"rendered":"http:\/\/www.idc.net\/help\/123146\/"},"modified":"2023-09-11T18:38:07","modified_gmt":"2023-09-11T10:38:07","slug":"linux%e5%ae%9e%e6%88%98%ef%bc%9a%e5%85%b3%e9%97%ad%e8%b0%83%e5%ba%a6%e4%bb%bb%e5%8a%a1%e6%8f%90%e5%8d%87%e7%b3%bb%e7%bb%9f%e6%80%a7%e8%83%bd-linux%e5%85%b3%e9%97%ad%e8%b0%83%e5%ba%a6%e4%bb%bb","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/123146\/","title":{"rendered":"Linux\u5b9e\u6218\uff1a\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1\u63d0\u5347\u7cfb\u7edf\u6027\u80fd (linux\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1)"},"content":{"rendered":"<p>\u968f\u7740\u6280\u672f\u7684\u53d1\u5c55\u548c\u5e94\u7528\u573a\u666f\u7684\u589e\u591a\uff0c\u670d\u52a1\u5668\u6027\u80fd\u7684\u8868\u73b0\u5df2\u7ecf\u6210\u4e3a\u4e86\u5173\u6ce8\u7684\u91cd\u70b9\u4e4b\u4e00\u3002\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u7a33\u5b9a\u6027\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5c06\u4ecb\u7ecd\u5982\u4f55\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1\u4ee5\u63d0\u5347\u7cfb\u7edf\u6027\u80fd\uff0c\u5e76\u89e3\u91ca\u5176\u80cc\u540e\u7684\u539f\u7406\u3002<\/p>\n<p>\u4ec0\u4e48\u662f\u8c03\u5ea6\u4efb\u52a1\uff1f<\/p>\n<p>\u5728\u8ba1\u7b97\u673a\u79d1\u5b66\u4e2d\uff0c\u8c03\u5ea6\u4efb\u52a1\uff08\u6216\u79f0\u8fdb\u7a0b\u8c03\u5ea6\uff09\u662f\u64cd\u4f5c\u7cfb\u7edf\u7528\u6765\u63a7\u5236\u6216\u5206\u914dCPU\u65f6\u95f4\u7247\u7684\u8fc7\u7a0b\u3002\u7b80\u5355\u6765\u8bf4\uff0c\u5f53\u8ba1\u7b97\u673a\u4e2d\u6709\u591a\u4e2a\u8fdb\u7a0b\u5728\u8fd0\u884c\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5206\u522b\u4e3a\u6bcf\u4e2a\u8fdb\u7a0b\u5206\u914d\u4e00\u5b9a\u7684CPU\u65f6\u95f4\u7247\uff0c\u4f7f\u5b83\u4eec\u5728\u4e00\u5b9a\u65f6\u95f4\u5185\u8f6e\u6d41\u8fd0\u884c\u3002\u8fd9\u5c31\u662f\u8c03\u5ea6\u4efb\u52a1\u7684\u539f\u7406\u3002<\/p>\n<p>\u4e3a\u4ec0\u4e48\u8981\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1\uff1f<\/p>\n<p>\u867d\u7136\u8c03\u5ea6\u4efb\u52a1\u5728\u591a\u4efb\u52a1\u5904\u7406\u4e2d\u53d1\u6325\u7740\u91cd\u8981\u7684\u4f5c\u7528\uff0c\u4f46\u5728\u4e00\u4e9b\u60c5\u51b5\u4e0b\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1\u53ef\u4ee5\u63d0\u5347\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u7a33\u5b9a\u6027\u3002\u6bd4\u5982\uff0c\u5728\u8fdb\u884c\u5927\u91cf\u6570\u636e\u5904\u7406\u3001\u9ad8\u8d1f\u8f7d\u7684\u7f51\u7edc\u5e94\u7528\u6216\u9700\u8981\u5904\u7406\u5b9e\u65f6\u6570\u636e\u7684\u5e94\u7528\u4e0b\uff0c\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1\u53ef\u4ee5\u786e\u4fddCPU\u5728\u5904\u7406\u76f8\u5e94\u4efb\u52a1\u65f6\u4e0d\u4f1a\u88ab\u5176\u4ed6\u4efb\u52a1\u5360\u7528\u800c\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u6b64\u5916\uff0c\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1\u8fd8\u53ef\u4ee5\u964d\u4f4e\u7cfb\u7edf\u5728\u542f\u52a8\u8fc7\u7a0b\u3001\u8fdb\u7a0b\u5207\u6362\u548c\u4e2d\u65ad\u5904\u7406\u65b9\u9762\u7684\u5f00\u9500\uff0c\u4ece\u800c\u63d0\u5347\u64cd\u4f5c\u7cfb\u7edf\u7684\u6574\u4f53\u6027\u80fd\u548c\u8fd0\u884c\u6548\u7387\u3002<\/p>\n<p>\u5982\u4f55\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1\uff1f<\/p>\n<p>\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\/sys\/kernel\/sched_features\u6587\u4ef6\u7684\u503c\uff0c\u6765\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u4e0b\u5217\u547d\u4ee4\u6765\u5b9e\u73b0\uff1a<\/p>\n<p>\u201c`<\/p>\n<p>echo NO_SCHED &gt; \/sys\/kernel\/sched_features<\/p>\n<p>\u201c`<\/p>\n<p>\u6267\u884c\u8fd9\u4e2a\u547d\u4ee4\u540e\uff0c\u4f60\u5c06\u4f1a\u770b\u5230\u7cfb\u7edf\u5f39\u51fa\u4e86\u9519\u8bef\u63d0\u793a\u4fe1\u606f\u3002\u8fd9\u662f\u56e0\u4e3a\/in\/init\u4e2d\u5b89\u6392\u4e86\u540e\u9762\u91cd\u65b0\u8c03\u5ea6\uff0c\u88abNOP_LOCKS\u8feb\u4f7f\u8fdb\u884c\u7684\u4ee3\u7801\u5c31\u4e0d\u518d\u8c28\u614e\uff0c\u65e0\u6cd5\u963b\u6b62\u5176\u8fd0\u884c\u3002\u629b\u51fa\u7684\u5b9e\u9645\u9519\u8bef\u662f\u201csegmentation fault\u201d\uff0c\u800c\u51fa\u9519\u7684\u884c\u6570\u662f reboot \u6210\u5219\u4e00\u91cf\uff0c\u5c31\u51fa\u73b0\u4e86\u5185\u6838\u5d29\u6e83\u7684\u60c5\u51b5\u3002<\/p>\n<p>\u8981\u89e3\u51b3\u8fd9\u79cd\u9519\u8bef\uff0c\u53ea\u9700\u5728\u7a0b\u5e8f\u4e2d\u52a0\u5165\u5904\u7406SIGSEGV\u7684\u4fe1\u53f7\u5904\u7406\u5668\u7a0b\u5e8f\uff0c\u6216\u8005\u91cd\u5199\/in\/init\u7a0b\u5e8f\u5373\u53ef\u3002\u60f3\u5fc5\uff0c\u8fd9\u5df2\u7ecf\u4e0d\u662f\u4e00\u4e2a\u666e\u901a\u7684\u7528\u6237\u80fd\u591f\u8f7b\u677e\u5e94\u5bf9\u7684\u64cd\u4f5c\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u66f4\u63a8\u8350\u7684\u65b9\u5f0f\u662f\u4f7f\u7528Linux\u5185\u6838\u53c2\u6570\uff0c\u4ee5\u7981\u7528CPU\u8c03\u5ea6\u7a0b\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u5728\u7cfb\u7edf\u542f\u52a8\u65f6\u7f16\u8f91grub.cfg\u6587\u4ef6\uff0c\u589e\u52a0\u8fd9\u4e9b\u53c2\u6570\u3002\u53ef\u4ee5\u6dfb\u52a0\u4ee5\u4e0b\u9009\u9879\uff1a<\/p>\n<p>\u201c`<\/p>\n<p>nohz=on <\/p>\n<p>isolcpus=0<\/p>\n<p>\u201c`<\/p>\n<p>nohz\u9009\u9879\u8868\u793a\u5f00\u542f\u5b8c\u5168\u4e0d\u8981\u65f6\u949f\u4e2d\u65ad\u539f\u7406\uff0c\u5b83\u4f7f\u5f97\u673a\u5668\u80fd\u591f\u66f4\u6709\u6548\u7684\u505a\u597d\u4f18\u5316\uff0c\u907f\u514d\u6392\u961f\u51fa\u73b0\u56e0\u4e3a\u77ed\u65f6\u95f4\u5185\u8fc7\u591a\u7684\u8fdb\u7a0b\u5207\u6362\u6240\u5bfc\u81f4\u7684\u6027\u80fd\u4e0b\u964d\u3002\u6bd4\u5982\uff0c\u4e00\u4e9b\u8ba1\u7b97\u673a\u975e\u5e38\u6ce8\u91cd\u5b9e\u65f6\u6027\uff0c\u7981\u7528\u65f6\u949f\u4e2d\u65ad\u5c31\u80fd\u591f\u5728\u4fdd\u8bc1\u5b9e\u65f6\u6027\u7684\u540c\u65f6\u663e\u8457\u63d0\u9ad8\u5904\u7406\u6027\u80fd\uff0c\u5927\u5927\u964d\u4f4e\u4e86CPU\u7684\u5f00\u9500\u3002<\/p>\n<p>\u53e6\u5916\uff0cisolcpus\u9009\u9879\u6307\u5b9aCPU0\u5c06\u4f1a\u6210\u4e3a\u7cfb\u7edf\u4efb\u52a1\u548c\u7cfb\u7edf\u529f\u80fd\u4e13\u7528\u5904\u7406\u5668\uff0c\u5269\u4e0b\u7684CPU\u5219\u4e0d\u62c5\u4efb\u7cfb\u7edf\u4efb\u52a1\uff0c\u8fd9\u8ba9\u4f4d\u7f6e\u53ef\u63a7\u7684\u5904\u7406\u5668\u80fd\u591f\u66f4\u9ad8\u6548\u5730\u8fdb\u884c\u5de5\u4f5c\u3002\u5982\u679c\u60a8\u6709\u5177\u4f53\u7684\u4efb\u52a1\u9700\u8981\u4fdd\u8bc1\u9ad8\u6027\u80fd\uff0c\u53ea\u9700\u8981\u5728\u90a3\u4e2aCPU\u6838\u5fc3\u4e0a\u8fd0\u884c\u5373\u53ef\u3002<\/p>\n<p>\u7ed3\u8bed<\/p>\n<p>\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1\u662f\u63d0\u9ad8Linux\u7cfb\u7edf\u6027\u80fd\u7684\u4e00\u79cd\u6709\u6548\u65b9\u5f0f\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5728\u67d0\u4e9b\u7279\u5b9a\u573a\u666f\u4e0b\uff0c\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1\u53ef\u80fd\u4f1a\u5f15\u8d77\u95ee\u9898\u3002\u56e0\u6b64\uff0c\u5728\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1\u524d\uff0c\u8bf7\u786e\u5b9a\u60a8\u7684\u7cfb\u7edf\u53ef\u4ee5\u627f\u53d7\u6b64\u79cd\u6a21\u5f0f\uff0c\u5e76\u5728\u5b9e\u6218\u4e2d\u8c28\u614e\u914d\u7f6e\u3002\u5e0c\u671b\u672c\u6587\u80fd\u5bf9\u60a8\u5728\u63d0\u9ad8Linux\u7cfb\u7edf\u6027\u80fd\u65b9\u9762\u63d0\u4f9b\u4e00\u4e9b\u6709\u7528\u7684\u53c2\u8003\u3002<\/p>\n<p><strong>\u76f8\u5173\u95ee\u9898\u62d3\u5c55\u9605\u8bfb\uff1a<\/strong><\/p>\n<ul>\n<li>\u600e\u4e48\u5b9e\u73b0linux\u6574\u70b9\u548c\u534a\u70b9\u6267\u884c\u4efb\u52a1<\/li>\n<\/ul>\n<h3>\u600e\u4e48\u5b9e\u73b0linux\u6574\u70b9\u548c\u534a\u70b9\u6267\u884c\u4efb\u52a1<\/h3>\n<p>linux\u6574\u70b9\u548c\u534a\u70b9\u6267\u884c\u4efb\u52a1\u5b9e\u73b0\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n<p>(1)at\u547d\u4ee4<\/p>\n<p>\u3000\u3000\u5047\u5982\u6211\u4eec\u53ea\u662f\u60f3\u8981\u8ba9\u7279\u5b9a\u4efb\u52a1\u8fd0\u884c\u4e00\u6b21,\u90a3\u4e48\uff0c\u8fd9\u65f6\u5019\u5c31\u8981\u7528\u5230at\u76d1\u63a7\u7a0b\u5e8f\u4e86\u3002<\/p>\n<p>\u3000\u3000\u8bbe\u7f6eat\u547d\u4ee4\u5f88\u7b80\u5355\uff0c\u6307\u793a\u5b9a\u8fd0\u884c\u7684\u65f6\u95f4\uff0c\u90a3\u4e48\u5c31\u4f1a\u5728\u54ea\u4e2a\u65f6\u5019\u8fd0\u884c\u3002at\u7c7b\u4f3c\u6253\u5370\u8fdb\u7a0b\uff0c\u4f1a\u628a\u4efb\u52a1\u653e\u5230\/var\/spool\/at\u76ee\u5f55\u4e2d\uff0c\u5230\u6307\u5b9a\u65f6\u95f4\u8fd0\u884c\u5b83\u3002at\u547d\u4ee4\u76f8\u5f53\u4e8e\u53e6\u4e00\u4e2ashell\uff0c\u8fd0\u884cat time\u547d\u4ee4\u65f6\uff0c\u5b83\u53d1\u9001\u4e00\u4e2a\u4e2a\u547d\u4ee4\uff0c\u53ef\u4ee5\u8f93\u5165\u4efb\u610f\u547d\u4ee4\u6216\u8005\u7a0b\u5e8f\u3002at now + time\u547d\u4ee4\u53ef\u4ee5\u5728\u6307\u793a\u4efb\u52a1\u3002<\/p>\n<p>\u3000\u3000\u5047\u8bbe\u5904\u7406\u4e00\u4e2a\u6570\u636e\u5e93\uff0c\u8981\u5728\u522b\u4eba\u4e0d\u7528\u7cfb\u7edf\u65f6\u53bb\u5904\u7406\u6570\u636e\uff0c\u6bd4\u5982\u51cc\u66683\u70b910\u5206\u3002\u90a3\u4e48\u6211\u4eec\u5c31\u5e94\u8be5\u5148\u5efa\u7acb\/home\/kyle\/do_job\u811a\u672c\u7ba1\u7406\u6570\u636e\u5e93\uff0c\u8ba1\u5212\u5904\u7406\/home\/kyle\/do_job\u6587\u4ef6\u4e2d\u7684\u7ed3\u679c\u3002\u6b63\u5e38\u65b9\u5f0f\u662f\u8fd9\u6837\u542f\u52a8\u4e0b\u5217\u547d\u4ee4:<\/p>\n<p># at 2:05 tomorrow<\/p>\n<p>at&gt;\/home\/kyle\/do_job<\/p>\n<p>at&gt; Ctrl+D<\/p>\n<p>AT Time\u4e2d\u7684\u65f6\u95f4\u8868\u793a\u65b9\u6cd5<\/p>\n<p>\u2013<\/p>\n<p>\u3000\u3000\u65f6\u95f4\u4f8b\u5b50\u8bf4\u660e<\/p>\n<p>\u2013<\/p>\n<p>Minute at now + 5 minutes \u4efb\u52a1\u57285\u5206\u949f\u540e\u8fd0\u884c<\/p>\n<p>Hour at now + 1 hour \u4efb\u52a1\u57281\u5c0f\u65f6\u540e\u8fd0\u884c<\/p>\n<p>Days at now + 3 days \u4efb\u52a1\u57283\u5929\u540e\u8fd0\u884c<\/p>\n<p>Weeks at now + 2 weeks \u4efb\u52a1\u5728\u4e24\u5468\u540e\u8fd0\u884c<\/p>\n<p>Fixed at midnight \u4efb\u52a1\u5728\u5348\u591c\u8fd0\u884c<\/p>\n<p>Fixed at 10:30pm \u4efb\u52a1\u5728\u665a\u4e0a10\u70b930\u5206<\/p>\n<p>\u3000\u3000\u6ce8\u610f\uff1a\u4e00\u5b9a\u8981\u68c0\u67e5\u4e00\u4e0batq\u7684\u670d\u52a1\u662f\u5426\u542f\u52a8\uff0c\u6709\u4e9b\u64cd\u4f5c\u7cfb\u7edf\u672a\u5fc5\u662f\u9ed8\u8ba4\u542f\u52a8\u7684\uff0c linux\u9ed8\u8ba4\u4e3a\u4e0d\u542f\u52a8\uff0c\u800cubuntu\u9ed8\u8ba4\u4e3a\u542f\u52a8\u7684\u3002\u68c0\u67e5\u662f\u5426\u542f\u52a8\uff0c\u7528service atd\u68c0\u67e5\u8bed\u6cd5\uff0c\u7528service atd status\u68c0\u67e5atd\u7684\u72b6\u6001\uff0c\u7528service atd start\u542f\u52a8atd\u670d\u52a1\u3002<\/p>\n<p>\u67e5\u770bat\u6267\u884c\u7684\u5177\u4f53\u5185\u5bb9\uff1a\u4e00\u822c\u4f4d\u4e8e\/var\/spool\/at\u76ee\u5f55\u4e0b\u9762\uff0c\u7528vi\u6253\u5f00\uff0c\u5728\u6700\u540e\u4e00\u90e8\u5206\u5c31\u662f\u4f60\u7684\u6267\u884c\u7a0b\u5e8f<\/p>\n<p>(2)crontab<\/p>\n<p>cron\u662f\u4e00\u4e2aLinux\u4e0b\u7684\u5b9a\u65f6\u6267\u884c\u5de5\u5177\uff0c\u53ef\u4ee5\u5728\u65e0\u9700\u4eba\u5de5\u5e72\u9884\u7684\u60c5\u51b5\u4e0b\u8fd0\u884c\u4f5c\u4e1a\u3002\u7531\u4e8eCron \u662fLinux\u7684\u5185\u7f6e\u670d\u52a1\uff0c\u4f46\u5b83\u4e0d\u81ea\u52a8\u8d77\u6765\uff0c\u53ef\u4ee5\u7528\u4ee5\u4e0b\u7684\u65b9\u6cd5\u542f\u52a8\u3001\u5173\u95ed\u8fd9\u4e2a\u670d\u52a1\uff1a<\/p>\n<p>\/in\/service crond start \/\/\u542f\u52a8\u670d\u52a1<\/p>\n<p>\/in\/service crond stop \/\/\u5173\u95ed\u670d\u52a1<\/p>\n<p>\/in\/service crond restart \/\/\u91cd\u542f\u670d\u52a1<\/p>\n<p>\/in\/service crond reload \/\/\u91cd\u65b0\u8f7d\u5165\u914d\u7f6e<\/p>\n<p>\/in\/service crond status \/\/\u67e5\u770b\u670d\u52a1\u72b6\u6001<\/p>\n<p>(crond\u6216cron\u770b\u5b9e\u9645\u60c5\u51b5<\/p>\n<p>service crond start #\u542f\u52a8\u670d\u52a1<\/p>\n<p>service crond stop #\u5173\u95ed\u670d\u52a1<\/p>\n<p>service crond restart #\u91cd\u542f\u670d\u52a1<\/p>\n<p>service crond reload #\u91cd\u65b0\u8f7d\u5165\u914d\u7f6e<\/p>\n<p>)<\/p>\n<p>\u3000\u3000\u4f60\u4e5f\u53ef\u4ee5\u5c06\u8fd9\u4e2a\u670d\u52a1\u5728\u7cfb\u7edf\u542f\u52a8\u7684\u65f6\u5019\u81ea\u52a8\u542f\u52a8\uff1a\u68da\u5907\u8001<\/p>\n<p>\u3000\u3000\u5728\/etc\/rc.d\/rc.local\u8fd9\u4e2a\u811a\u672c\u7684\u672b\u5c3e\u52a0\u4e0a\uff1a<\/p>\n<p>\/in\/service crond start<\/p>\n<p>\u3000\u3000\u73b0\u5728Cron\u8fd9\u4e2a\u670d\u52a1\u5df2\u7ecf\u5728\u8fdb\u7a0b\u91cc\u9762\u4e86\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u7528\u8fd9\u4e2a\u670d\u52a1\u4e86\uff0cCron\u670d\u52a1\u63d0\u4f9b\u4ee5\u4e0b\u51e0\u79cd\u63a5\u53e3\u4f9b\u5927\u5bb6\u4f7f\u7528\uff1a<\/p>\n<p>1\u3001\u76f4\u63a5\u7528crontab\u547d\u4ee4\u7f16\u8f91<\/p>\n<p>cron\u670d\u52a1\u63d0\u4f9b\u6eda\u6e23 crontab\u547d\u4ee4\u6765\u8bbe\u5b9acron\u670d\u52a1\u7684\uff0c\u4ee5\u4e0b\u662f\u8fd9\u4e2a\u547d\u4ee4\u7684\u4e00\u4e9b\u53c2\u6570\u4e0e\u8bf4\u660e\uff1a<\/p>\n<p>crontab -u \/\/\u8bbe\u5b9a\u67d0\u4e2a\u7528\u6237\u7684cron\u670d\u52a1\uff0c\u4e00\u822croot\u7528\u6237\u5728\u6267\u884c\u8fd9\u4e2a\u547d\u4ee4\u7684\u65f6\u5019\u9700\u8981\u6b64\u53c2\u6570<\/p>\n<p>crontab -l \/\/\u5217\u51fa\u67d0\u4e2a\u7528\u6237cron\u670d\u52a1\u7684\u8be6\u7ec6\u5185\u5bb9<\/p>\n<p>crontab -r \/\/\u5220\u9664\u67d0\u4e2a\u7528\u6237\u7684cron\u670d\u52a1<\/p>\n<p>crontab -e \/\/\u7f16\u8f91\u67d0\u4e2a\u7528\u6237\u7684cron\u670d\u52a1<\/p>\n<p>\u3000\u3000\u6bd4\u5982\u8bf4root\u67e5\u770b\u81ea\u5df1\u7684cron\u8bbe\u7f6e\uff1acrontab -u root -l<\/p>\n<p>\u3000\u3000\u518d\u4f8b\u5982\uff0croot\u60f3\u5220\u9664fred\u7684cron\u8bbe\u7f6e\uff1acrontab -u fred -r<\/p>\n<p>\u3000\u3000\u57fa\u672c\u683c\u5f0f :<\/p>\n<p>*****command<\/p>\n<p>\u3000\u3000\u5206\u3000\u65f6\u3000\u65e5\u3000\u6708\u3000\u5468\u3000\u547d\u4ee4<\/p>\n<p>\u3000\u3000\u7b2c1\u5217\u8868\u793a\u5206\u949f1\uff5e59 \u6bcf\u5206\u949f\u7528*\u6216\u8005 *\/1\u8868\u793a\u94fe\u5347<\/p>\n<p>\u3000\u3000\u7b2c2\u5217\u8868\u793a\u5c0f\u65f61\uff5e23(0\u8868\u793a0\u70b9)<\/p>\n<p>\u3000\u3000\u7b2c3\u5217\u8868\u793a\u65e5\u671f1\uff5e31<\/p>\n<p>\u3000\u3000\u7b2c4\u5217\u8868\u793a\u6708\u4efd1\uff5e12<\/p>\n<p>\u3000\u3000\u7b2c5\u5217\u6807\u8bc6\u53f7\u661f\u671f0\uff5e6(0\u8868\u793a\u661f\u671f\u5929)<\/p>\n<p>\u3000\u3000\u7b2c6\u5217\u8981\u8fd0\u884c\u7684\u547d\u4ee4<\/p>\n<p>crontab\u6587\u4ef6\u7684\u4e00\u4e9b\u4f8b\u5b50\uff1a<\/p>\n<p>#\u6bcf\u665a\u768421:30\u91cd\u542fapache\u3002<\/p>\n<p>30 21 * * * \/usr\/local\/etc\/rc.d\/lighttpd restart<\/p>\n<p>#\u6bcf\u67081\u300110\u300122\u65e5<\/p>\n<p>45 4 1,10,22 * * \/usr\/local\/etc\/rc.d\/lighttpdrestart<\/p>\n<p>#\u6bcf\u5929\u65e9\u4e0a6\u70b910\u5206<\/p>\n<p>10 6 * * * date<\/p>\n<p>#\u6bcf\u4e24\u4e2a\u5c0f\u65f6<\/p>\n<p>0 *\/2 * * * date<\/p>\n<p>#\u665a\u4e0a11\u70b9\u5230\u65e9\u4e0a8\u70b9\u4e4b\u95f4\u6bcf\u4e24\u4e2a\u5c0f\u65f6\uff0c\u65e9\u4e0a8\u70b9<\/p>\n<p>0 23-7\/2\uff0c8 * * * date<\/p>\n<p>#\u6bcf\u4e2a\u6708\u76844\u53f7\u548c\u6bcf\u4e2a\u793c\u62dc\u7684\u793c\u62dc\u4e00\u5230\u793c\u62dc\u4e09\u7684\u65e9\u4e0a11\u70b9<\/p>\n<p>* mon-wed date<\/p>\n<p>#1\u6708\u4efd\u65e5\u65e9\u4e0a4\u70b9<\/p>\n<\/p>\n<p>\u5728linux\u5e73\u53f0\u4e0a\u5982\u679c\u9700\u8981\u5b9e\u73b0\u4efb\u52a1\u8c03\u5ea6\u529f\u80fd\u53ef\u4ee5\u7f16\u5199cron\u811a\u672c\u6765\u5b9e\u73b0\u4ee5\u67d0\u4e00\u9891\u7387\u6267\u884c\u4efb\u52a1<\/p>\n<p>linux\u7f3a\u7701\u4f1a\u542f\u52a8crond\u8fdb\u7a0b\uff0ccrond\u8fdb\u7a0b\u4e0d\u9700\u8981\u7528\u6237\u542f\u52a8\u3001\u5173\u95ed\u3002 <\/p>\n<p>crond\u8fdb\u7a0b\u8d1f\u8d23\u8bfb\u53d6\u8c03\u5ea6\u4efb\u52a1\u5e76\u6267\u884c\uff0c\u7528\u6237\u53ea\u9700\u8981\u5c06\u76f8\u5e94\u7684\u8c03\u5ea6\u811a\u672c\u5199\u5165cron\u7684\u8c03\u5ea6\u914d\u7f6e\u6587\u4ef6\u4e2d\u3002 <\/p>\n<p>cron\u7684\u8c03\u5ea6\u6587\u4ef6\u6709\u4ee5\u4e0b\u51e0\u4e2a\uff1a <\/p>\n<p>crontab <\/p>\n<p>cron.d <\/p>\n<p>cron.daily <\/p>\n<p>cron.hourly <\/p>\n<p>cron.monthly <\/p>\n<p>cron.weekly <\/p>\n<p>\u6267\u884c\u65b9\u6cd5\u4e00\uff1a<\/p>\n<p>\u5982\u679c\u7528\u7684\u4efb\u52a1\u4e0d\u662f\u4ee5hourly monthly weekly\u65b9\u5f0f\u6267\u884c\uff0c\u5219\u53ef\u4ee5\u5c06\u76f8\u5e94\u7684crontab\u5199\u5165\u5230crontab \u6216cron.d\u76ee\u5f55\u4e2d\u3002 <\/p>\n<p>\u793a\u4f8b\uff1a<\/p>\n<p>\u6bcf\u9694\u4e00\u5206\u949f\u6267\u884c\u4e00\u6b21\u811a\u672c \/opt\/bin\/test-cron.sh <\/p>\n<p>\u53ef\u4ee5\u5728cron.d\u65b0\u5efa\u811a\u672c echo-date.sh <\/p>\n<p>\u5185\u5bb9\u4e3a<\/p>\n<p>*\/1 * * * * root \/opt\/bin\/test-cron.sh<\/p>\n<p>\u5728\u6307\u5b9a\u7684\u65f6\u95f4\u8fd0\u884c\u4efb\u52a1<\/p>\n<p>\u4e5f\u53ef\u4ee5\u901a\u8fc7at\u547d\u4ee4\u6765\u63a7\u5236\u5728\u6307\u5b9a\u7684\u65f6\u95f4\u8fd0\u884c\u4efb\u52a1<\/p>\n<p>\u5982\uff1a <\/p>\n<p>at -f test-cron.sh -v 10:25 <\/p>\n<p>\u5176\u4e2d-f \u6307\u5b9a\u811a\u672c\u6587\u4ef6\uff0c-v \u6307\u5b9a\u8fd0\u884c\u65f6\u95f4<\/p>\n<p>\u9996\u5148\u7528 contab -l \u5bfc\u51facontab\u7684\u914d\u7f6e\uff0c\u7136\u540e\u7f16\u8f91contabs.tmp\u6587\u4ef6\u3002\u4ee5\u4e00\u4e0b\u683c\u5f0f\u6dfb\u52a0\u4e00\u884c\uff1a<\/p>\n<p>\u5206\u949f\u5c0f\u65f6\u5929\u6708\u661f\u671f\u547d\u4ee4<\/p>\n<p>\u6bd4\u5982<\/p>\n<p>10 3 * * 0,6 hello<\/p>\n<p>\u5c31\u662f\u6bcf\u5468\u516d\u3001\u5468\u65e5\u76843\u70b910\u5206\u6267\u884chello\u7a0b\u5e8f\u3002<\/p>\n<p>15 4 * * 4-6 hello<\/p>\n<p>\u5c31\u662f\u4ece\u5468\u56db\u5230\u5468\u516d\u76844\u70b915\u70b9\u6267\u884chello\u7a0b\u5e8f\u3002<\/p>\n<p>\u7136\u540e\u7528contab contabs.tmp \u547d\u4ee4\u5bfc\u5165\u65b0\u7684\u914d\u7f6e\u3002<\/p>\n<p>\u4e00\u822c\u4e0d\u5efa\u8bae\u76f4\u63a5\u4fee\u6539\/etc\/\u4e0b\u7684\u76f8\u5173\u914d\u7f6e\u6587\u4ef6\u3002 <\/p>\n<p>\u542f\u52a8cron\u8fdb\u7a0b\u7684\u65b9\u6cd5\uff1a\/etc\/init.d\/crond start <\/p>\n<p>\u5f00\u673a\u5c31\u542f\u52a8cron\u8fdb\u7a0b\u7684\u8bbe\u7f6e\u547d\u4ee4\uff1achkconfig \u2013add crond<\/p>\n<p>\u6267\u884c\u65b9\u6cd5\u4e8c\uff1a<\/p>\n<p>\u628acron\u52a0\u5165\u5230\u542f\u52a8\u811a\u672c\u4e2d\uff1a<\/p>\n<p># rc-update add vixie-cron default<\/p>\n<p>crontab -l #\u67e5\u770b\u4f60\u7684\u4efb\u52a1<\/p>\n<p>crontab-e#\u7f16\u8f91\u4f60\u7684\u4efb\u52a1<\/p>\n<p>crontab-r#\u5220\u9664\u7528\u6237\u7684crontab\u7684\u5185\u5bb9<\/p>\n<p>\u5b9e\u4f8b\u8bb2\u89e3\u4e8c\uff1a<\/p>\n<p>\u7cfb\u7edfcron\u8bbe\u5b9a\uff1a\/etc\/crontab <\/p>\n<p> \u901a\u8fc7 \/etc\/crontab \u6587\u4ef6\uff0c\u53ef\u4ee5\u8bbe\u5b9a\u7cfb\u7edf\u5b9a\u671f\u6267\u884c\u7684\u4efb\u52a1\uff0c\u5f53\u7136\uff0c\u8981\u60f3\u7f16\u8f91\u8fd9\u4e2a\u6587\u4ef6\uff0c\u5f97\u6709root\u6743\u9650<\/p>\n<p>0 7 * * * root mpg123 ~\/wakeup.mp3<\/p>\n<p>\u5206\u65f6\u65e5\u6708\u5468 <\/p>\n<p>\u793a\u4f8b\uff1a <\/p>\n<p>0 4 * *rootemerge \u2013sync &amp;&amp; emerge -uDworld#\u6bcf\u5468\u65e5\u51cc\u66684\u70b9\uff0c\u66f4\u65b0\u7cfb\u7edf<\/p>\n<p>* root mail robin &gt; \/tmp\/test.txt<\/p>\n<p>\u665a\u4e0a11\u70b9\u5230\u65e9\u4e0a8\u70b9\u4e4b\u95f4\u6bcf\u4e24\u4e2a\u5c0f\u65f6\uff0c\u65e9\u4e0a\u516b\u70b9<\/p>\n<p>0 23-7\/2\uff0c8 * * * echo\u201dhave a good dream\uff1a\uff09\u201d &gt;&gt;\/tmp\/test.txt<\/p>\n<p>\u6bcf\u4e2a\u6708\u76844\u53f7\u4e0e\u6bcf\u4e2a\u793c\u62dc\u7684\u793c\u62dc\u4e00\u5230\u793c\u62dc\u4e09\u7684\u65e9\u4e0a11\u70b9<\/p>\n<p>* 1-3 command line<\/p>\n<p>1\u67081\u65e5\u65e9\u4e0a4\u70b9<\/p>\n<p>* command line<\/p>\n<p>\u6536\u83b7\uff1a\u53ef\u4ee5\u628a\u7ecf\u5e38\u8981\u505a\u7684\u4e00\u4e9b\u4e8b\u653e\u5230\u5176\u4e2d\uff0c\u7b80\u5316\u5de5\u4f5c\u91cf\uff0c\u5982\u6bcf\u5468\u4e00\u68c0\u67e5\u670d\u52a1\u5668\u7684\u8fd0\u884c\u72b6\u6001\uff0c\u67e5\u770b\u62a5\u544a\uff0c\u6740\u6389\u4e00\u4e9b\u8fdb\u7a0b\u7b49\u7b49\u2026\u2026<\/p>\n<p>\u6bcf\u9694\u4e09\u79d2\uff1a*****\/home\/somedir\/scripts.sh*****sleep3&amp;&amp;\/home\/somedir\/scripts.sh*****sleep6&amp;&amp;\/home\/somedir\/\u6d88\u6fc0scripts.sh*****sleep9&amp;&amp;\/home\/somedir\/scripts.sh*****sleep12&amp;&amp;\/home\/somedir\/\u62ff\u63e1\u889cscripts.sh*****sleep15&amp;&amp;\/home\/somedir\/scripts.sh*****sleep18&amp;&amp;\/home\/somedir\/scripts.sh*****sleep21&amp;&amp;\/home\/somedir\/scripts.sh*****sleep24&amp;&amp;\/home\/somedir\/scripts.sh*****sleep27&amp;&amp;\/home\/somedir\/scripts.sh*****sleep30&amp;&amp;\/home\/somedir\/scripts.sh*****sleep33&amp;&amp;\/home\/somedir\/scripts.sh*****sleep36&amp;&amp;\/home\/somedir\/scripts.sh*****sleep39&amp;&amp;\/home\/somedir\/scripts.sh*****sleep42&amp;&amp;\/home\/somedir\/scripts.sh*****sleep45&amp;&amp;\/home\/somedir\/scripts.sh*****sleep48&amp;&amp;\/home\/somedir\/scripts.sh*****sleep51&amp;&amp;\/\u76ae\u6e05home\/somedir\/scripts.sh*****sleep54&amp;&amp;\/home\/somedir\/scripts.sh*****sleep57&amp;&amp;\/home\/somedir\/scripts.sh<\/p>\n<p>\u5173\u4e8elinux\u5173\u95ed\u8c03\u5ea6\u4efb\u52a1\u7684\u4ecb\u7ecd\u5230\u6b64\u5c31\u7ed3\u675f\u4e86\uff0c\u4e0d\u77e5\u9053\u4f60\u4ece\u4e2d\u627e\u5230\u4f60\u9700\u8981\u7684\u4fe1\u606f\u4e86\u5417 \uff1f\u5982\u679c\u4f60\u8fd8\u60f3\u4e86\u89e3\u66f4\u591a\u8fd9\u65b9\u9762\u7684\u4fe1\u606f\uff0c\u8bb0\u5f97\u6536\u85cf\u5173\u6ce8\u672c\u7ad9\u3002<\/p>\n<p><a href=\"http:https:\/\/idc.net\/\">\u9999\u6e2f\u670d\u52a1\u5668<\/a>\u9996\u9009\u540e\u6d6a\u4e91\uff0c2H2G\u9996\u670810\u5143\u5f00\u901a\u3002<br 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