{"id":158935,"date":"2020-09-19T14:03:15","date_gmt":"2020-09-19T06:03:15","guid":{"rendered":"http:\/\/4563.org\/?p=158935"},"modified":"2020-09-19T14:03:15","modified_gmt":"2020-09-19T06:03:15","slug":"cron-%e6%b2%a1%e6%9c%89%e9%85%8d%e7%bd%ae%e6%96%87%e4%bb%b6%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=158935","title":{"rendered":"cron \u6ca1\u6709\u914d\u7f6e\u6587\u4ef6\uff1f"},"content":{"rendered":"
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cron \u6ca1\u6709\u914d\u7f6e\u6587\u4ef6\uff1f <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : DopaminePlz <\/span> <\/i> 3<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
\u5410\u69fd\u4e00\u4e0b\uff0c\u53cd\u4eba\u7c7b\u7684\u8bbe\u8ba1\u3002crontab -e \u7f16\u8f91\u540e\u4e0d\u77e5\u9053\u8dd1\u5230\u54ea\u91cc\u53bb\u4e86\uff0c \u5982\u679c\u6ca1\u6709\u91cd\u5b9a\u5411 crontab -l \u4fdd\u5b58\u5230\u6587\u4ef6\uff0c\u4e0b\u6b21\u91cd\u88c5\u7cfb\u7edf\u7684\u8bdd\u5c31\u53ea\u80fd\u4e00\u884c\u884c\u81ea\u5df1\u518d\u5199\u8fc7\u3002 <\/div>\n
\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (24<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ETiV <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    Google \u4e00\u4e0b
    crontab per-user location <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : arch9999 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u79d1\u666e\u4e00\u4e0b\uff0ccron \u5e76\u4e0d\u662f\u50cf\u67d0\u4e9b\u4eba\u8bf4\u7684\uff1a \u201ccron \u5728\u8fd0\u884c\u540e\u6bcf\u5206\u949f\u7684\u524d 59 \u79d2\u90fd\u5728\u731c\u7528\u6237\u8bbe\u5b9a\u7684\u5b9a\u65f6\u8ba1\u5212\uff0c\u6240\u4ee5\u5b83\u6700\u4f4e\u7684\u65f6\u95f4\u95f4\u9694\u662f\u5206\u949f\u3002\u201d <\/p>\n

    \u8fd9\u662f\u53ca\u5176\u8352\u8c2c\u7684\u4e00\u79cd\u8bf4\u6cd5\u3002<\/p>\n

    \u5b9e\u9645\u4e0a\uff0c\u4ed4\u7ec6\u67e5\u770b\u6e90\u4ee3\u7801\u5c31\u4f1a\u53d1\u73b0\uff0c\u5176\u5b9e cron \u901a\u8fc7\u201c\u7279\u6709\u201d\uff08\u5185\u6838\u8d4b\u4e88\uff09\u7684\u65b9\u5f0f\u5c06\u7528\u6237\u7ed9\u5b9a\u7684\u5b9a\u65f6\u8ba1\u5212\u5199\u5165\u5230 CPU \u5185\u90e8\u4e00\u4e2a\u4e13\u6709\u7684\u5b58\u50a8\u5355\u5143\uff0c\u6240\u4ee5 cron \u65e0\u9700\u5728\u6587\u4ef6\u7cfb\u7edf\u4e2d\u5b58\u50a8\u914d\u7f6e\u6587\u4ef6\u4e5f\u53ef\u4ee5\u6b63\u5e38\u8fd0\u884c\u7528\u6237\u7ed9\u5b9a\u7684\u5b9a\u65f6\u8ba1\u5212\uff0c\u5e76\u7cbe\u51c6\u7684\u8fd0\u884c\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : privil <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5f53\u5bf9 crontab \u6240\u505a\u7684\u6539\u53d8\u88ab\u4fdd\u5b58\u540e,\u8be5 crontab \u6587\u4ef6\u5c31\u4f1a\u6839\u636e\u8be5\u7528\u6237\u540d\u88ab\u4fdd\u5b58,\u5e76\u5199\u5165\u6587\u4ef6 \/var\/spool\/cron\/username \u4e2d\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : privil <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u8fd9\u5c5e\u4e8e \u83dc\uff0c\u65e0\u80fd\u72c2\u6012\u5417\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : sutra <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    and for macOS: sudo cat \/var\/at\/tabs\/${USER} <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : jinliming2 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \uff08\u6211\u9009\u62e9 systemd.timer
    Linux \u7684\u914d\u7f6e\u6587\u4ef6\u53ef\u4ee5\u5728\u8fd9\u91cc\u627e\u5230\uff1a\/var\/spool\/cron\/crontabs\/\u7528\u6237\u540d <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ysc3839 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @arch9999 \u201c\u731c\u7528\u6237\u8bbe\u5b9a\u7684\u5b9a\u65f6\u8ba1\u5212\u201d\u662f\u4ec0\u4e48\u610f\u601d\uff1f crond \u672c\u6765\u5c31\u6709\u201c\u7528\u6237\u8bbe\u5b9a\u7684\u5b9a\u65f6\u8ba1\u5212\u201d\u7684\u4fe1\u606f\uff0c\u4e3a\u4ec0\u4e48\u8981\u201c\u731c\u201d\uff1f<\/p>\n

    \u5728\u6211\u770b\u6765\uff0c\u201c\u5c06\u7528\u6237\u7ed9\u5b9a\u7684\u5b9a\u65f6\u8ba1\u5212\u5199\u5165\u5230 CPU \u5185\u90e8\u4e00\u4e2a\u4e13\u6709\u7684\u5b58\u50a8\u5355\u5143\u201d\u624d\u662f\u53ca\u5176\u8352\u8c2c\u7684\u4e00\u79cd\u8bf4\u6cd5\uff0c\u5e02\u9762\u4e0a\u4e0d\u540c\u7528\u9014\u7684 CPU \u90a3\u4e48\u591a\uff0c\u4e0d\u592a\u53ef\u80fd\u6240\u6709 CPU \u90fd\u63d0\u4f9b\u4e00\u4e2a\u4e13\u6709\u7684\u5b58\u50a8\u5355\u5143\u3002
    \u540c\u65f6\u4ed4\u7ec6\u67e5\u770b busybox \u7684\u6e90\u4ee3\u7801\u5c31\u4f1a\u53d1\u73b0\uff0c\u5b83\u4ec5\u4ec5\u662f\u56e0\u4e3a sleep_time \u8bbe\u7f6e\u6210\u4e86 60\uff0c\u6240\u4ee5\u5b83\u6700\u4f4e\u7684\u65f6\u95f4\u95f4\u9694\u662f\u5206\u949f\u3002https:\/\/github.com\/mirror\/busybox\/blob\/a949399d178f7b052ada2099c62621736eafce44\/miscutils\/crond.c#L1066-L1074
    \u4e5f\u53ef\u4ee5\u4ece\u4ee3\u7801\u4e2d\u770b\u51fa\uff0cbusybox crond \u662f\u901a\u8fc7\u8bfb\u53d6\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u914d\u7f6e\u4fe1\u606f\u6765\u8fd0\u884c\u7684\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : mepwang <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ysc3839 \u786e\u5b9e\u6bcf\u4e2a CPU\uff0c\u4ece\u670d\u52a1\u5668\u5230\u684c\u9762\u5230\u5d4c\u5165\u5f0f\uff0c\u90fd\u63d0\u4f9b\u4e86\u591a\u4e2a\u7279\u6b8a\u7684\u5b58\u50a8\u5355\u5143\uff08\u5b9a\u65f6\u5668 \/timer \uff09\uff0c\u4e13\u95e8\u7528\u6765\u5904\u7406\u5b9a\u65f6\uff0c\u7cbe\u5ea6\u53ef\u4ee5\u662f CPU \u65f6\u949f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : arch9999 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ysc3839 #7 <\/p>\n

    \u8352\u8c2c\uff0c\u90a3\u4f60\u600e\u4e48\u89e3\u91ca\u4e3b\u627e\u4e0d\u5230\u914d\u7f6e\u6587\u4ef6\uff0c\u96be\u9053\u662f\u4ed6\u773c\u778e\u5417\uff1f <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : pmispig <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u90a3\u4f60\u4e3a\u4f55\u4e0d\u7528 \/etc\/crontab \u5462\uff0c\u6211\u5c31\u6700\u8ba8\u538c crontab -e \u7684\u59ff\u52bf\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ysc3839 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @arch9999 \u6211\u89e3\u91ca\u4e0d\u4e86\u201c\u4e3b\u627e\u4e0d\u5230\u914d\u7f6e\u6587\u4ef6\u201d\uff0c\u4f46\u662f\u8fd9\u548c\u4f60\u8bf4\u7684\u8bdd\u662f\u5426\u6b63\u786e\u6709\u4ec0\u4e48\u5173\u7cfb\u5417\uff1f
    \u6211\u4e0a\u9762\u7684\u56de\u590d\u662f\u5728\u53cd\u9a73\u4f60\u7684\u8bf4\u6cd5\uff0c\u5e76\u4e0d\u662f\u5728\u8ba8\u8bba\u201c\u4e3b\u627e\u4e0d\u5230\u914d\u7f6e\u6587\u4ef6\u201d\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : arch9999 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ysc3839 #11 <\/p>\n

    \u522b\u7684\u5730\u65b9\u6211\u7ba1\u4e0d\u7740\uff0c\u5728\u8fd9\u4e2a\u5e16\u5b50\u91cc\uff0ccron \u7684\u914d\u7f6e\u6587\u4ef6\u4e00\u5b9a\u662f\u88ab\u5b58\u50a8\u5230 CPU \u7684\u67d0\u4e2a\u5b58\u50a8\u5355\u5143\u4e86\uff0c\u5426\u5219\u4ed6\u4e0d\u4f1a\u627e\u4e0d\u5230\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : love <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @arch9999 \u4f60\u4ed4\u7ec6\u770b\uff0c\u4ed6\u6ca1\u6709\u627e\uff0c\u4ed6\u662f\u7528\u6807\u51c6\u7f16\u8f91\u65b9\u5f0f crontab -e \u6539\u6587\u4ef6\uff0c\u8fd9\u4e2a\u65b9\u5f0f\u6ca1\u544a\u8bc9\u4f60\u6700\u7ec8\u6587\u4ef6\u5728\u54ea\uff0c\u8fd9\u548c CPU \u6709\u4ec0\u4e48\u5173\u7cfb\uff08\u8bdd\u8bf4 cron \u771f\u653e\u5230 CPU \u4e86\uff1f\u8fd9\u7279\u4e48\u9ad8\u5c04\u70ae\u6253\u868a\u5b50\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : rootww21 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u54c8\u54c8\u54c8 \u4e50\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : rootww21 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \/var\/spool\/cron\/username \u4e0d\u662f\u8fd9\u91cc\u5417 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : skymei <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u53ef\u4ee5\u5728 \/etc\/cron.d \u91cc\u9762\u914d\u7f6e\u7684\uff0c\u4e0d\u9700\u8981 -e \u5168\u5c40\u7684\u65b9\u5f0f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : liberty1900 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7c7b Unix \u7cfb\u7edf\u4e00\u5207\u90fd\u662f\u6587\u4ef6
    \u8fd9\u4e2a\u4e5f\u8dd1\u4e0d\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : liangming1 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u53ef\u4ee5\u7406\u89e3\u4e3a \u65e0\u80fd\u72c2\u6012 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : catinsides <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u63d0\u95ee\u59ff\u52bf:
    cron \u7684\u914d\u7f6e\u6587\u4ef6\u5728\u54ea\u91cc? \u00d7
    cron \u600e\u4e48\u8fde\u914d\u7f6e\u6587\u4ef6\u90fd\u6ca1\u6709\uff01\u221a <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : swulling <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @arch9999 \u627e\u4e0d\u5230\u53ea\u662f\u56e0\u4e3a lz \u6ca1\u770b\u6587\u6863\uff0c\u5e76\u4e0d\u662f cron \u4e0d\u5199\u914d\u7f6e\u6587\u4ef6\uff0c\u4e5f\u4e0d\u662f\u914d\u7f6e\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u66f4\u4e0d\u662f\u6709\u5565 cpu \u6765\u5b58\u3002<\/p>\n

    \u5c31\u597d\u50cf\u6709\u76f2\u4eba\u53d1\u5e16\u8bf4\u770b\u4e0d\u89c1\u592a\u9633\uff0c\u800c\u4f60\u5728\u4e00\u672c\u6b63\u7ecf\u7684\u89e3\u91ca\u592a\u9633\u672c\u8eab\u5c31\u770b\u4e0d\u89c1\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : liuxu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u597d\u4e86\u4e0a\u7684\u5927\u54e5\u4eec\u522b\u6253\u67b6\u4e86\uff0clinux \u7684\u5927\u4f6c\u4eec\u5c31\u559c\u6b22\u7528\u8fd9\u4e48\u76f4\u63a5\u7684\u95ee\u5019\u5185\u5fc3\u7684\u8868\u8fbe\u65b9\u5f0f<\/p>\n

    \/etc \u4e0b\u4e00\u822c\u662f\u7528\u6237\u7f16\u8f91\uff0c\u8f6f\u4ef6\u8bfb\u53d6\u7684\u914d\u7f6e\u6587\u4ef6
    \/var \u4e0b\u4e00\u822c\u662f\u7531\u8f6f\u4ef6\u751f\u6210\u7684\u6570\u636e\u6587\u4ef6<\/p>\n

    \u5e38\u8bc6\uff0c\u4e86\u89e3\u4e00\u4e0b\u5c31\u53ef\u4ee5\u4e86\uff0c\u300a\u9e1f\u54e5\u7684 linux \u79c1\u623f\u83dc\u300b\u6709\u4e00\u7ae0\u6709\u8bf4\u660e <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : arch9999 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @love #13
    @swulling #20 <\/p>\n

    \u4f60\u4eec\u5f00\u5fc3\u5c31\u597d\u54af\uff0c\u6211\u53ea\u662f\u7f16\u4e2a\u6545\u4e8b\u8ba9\u4ed6\u89c9\u5f97\u627e\u4e0d\u5230\u914d\u7f6e\u6587\u4ef6\u597d\u53d7\u4e00\u70b9\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : swulling <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @arch9999 \u5475\u5475 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : arch9999 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @swulling #23
    \u5475\u5475 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

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