{"id":535,"date":"2017-02-11T20:29:50","date_gmt":"2017-02-11T12:29:50","guid":{"rendered":"http:\/\/192.168.1.20\/?p=535"},"modified":"2017-02-11T20:30:00","modified_gmt":"2017-02-11T12:30:00","slug":"{d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}e6{d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}a0{47dd41ec6bdcbd9a214c783a3735392b82ea6d1d918378c5a53e0640702d813","status":"publish","type":"post","link":"http:\/\/alextop.top\/?p=535","title":{"rendered":"\u6811\u8393\u6d3e\u2014\u2014Cron\u548cCrontab\uff08\u5b9a\u65f6\u4efb\u52a1\uff09"},"content":{"rendered":"

Cron\u662fUnix\u7cfb\u7edf<\/span><\/a>\u7684\u4e00\u4e2a\u914d\u7f6e\u5b9a\u671f\u4efb\u52a1\u7684\u5de5\u5177\uff0c\u7528\u4e8e\u5b9a\u671f\u6216\u8005\u4ee5\u4e00\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u6267\u884c\u4e00\u4e9b\u547d\u4ee4\u6216\u8005\u811a\u672c\uff1b\u53ef\u6267\u884c\u7684\u4efb\u52a1\u8303\u56f4\u53ef\u4ee5\u662f\u6bcf\u5929\u591c\u91cc\u81ea\u52a8\u5907\u4efd\u7528\u6237\u7684home\u6587\u4ef6\u5939\uff0c\u4e5f\u53ef\u4ee5\u6bcf\u4e2a\u5c0f\u65f6\u8bb0\u5f55CPU\u7684\u4fe1\u606f\u65e5\u5fd7\u3002
\n<\/span><\/p>\n

crontab\uff08cron table\uff09\u547d\u4ee4\u7528\u4e8e\u7f16\u8f91\u6267\u884c\u4e2d\u7684\u5b9a\u671f\u4efb\u52a1\u5217\u8868\uff0c\u5e76\u4e14\u64cd\u4f5c\u662f\u57fa\u4e8e\u6bcf\u4e2a\u7528\u6237\u7684\uff0c\u6bcf\u4e00\u4e2a\u7528\u6237\uff08\u5305\u62ecroot\u7528\u6237\uff09\u90fd\u62e5\u6709\u81ea\u5df1\u7684crontab\u3002
\n<\/span><\/p>\n

EDITING CRONTAB\uff08\u7f16\u8f91crontab\uff09
\n<\/strong><\/span><\/p>\n

\u8fd0\u884ccrontab\u548c-e\u9009\u9879\u6765\u7f16\u8f91cron table\uff1a
\n<\/span><\/p>\n

crontab -e
\n<\/span><\/p>\n

SELECT AN EDIROR\uff08\u9009\u62e9\u4e00\u4e2a\u7f16\u8f91\u5668\uff09
\n<\/strong><\/span><\/p>\n

\u7b2c\u4e00\u6b21\u8fd0\u884ccrontab\u547d\u4ee4\u7684\u65f6\u5019\u4f1a\u63d0\u793a\u4f60\u9009\u62e9\u4e00\u4e2a\u7f16\u8f91\u5668\u3002\u5982\u679c\u4f60\u4e0d\u786e\u5b9a\u4f7f\u7528\u54ea\u4e00\u4e2a\uff0c\u4f60\u53ef\u4ee5\u76f4\u63a5\u56de\u8f66\u9009\u62e9\u9ed8\u8ba4\u7684nano\u7f16\u8f91\u5668\u3002
\n<\/span><\/p>\n

\u6bcf\u4e00\u9879cron\u5b9e\u4f53\u7684\u5185\u5bb9\u90fd\u5305\u542b\u516d\u4e2a\u90e8\u5206\uff1a\u5206\u949f\u3001\u5c0f\u65f6\u3001\u6708\u4efd\u4e2d\u7684\u54ea\u4e00\u5929\u3001\u5e74\u4efd\u4e2d\u7684\u54ea\u4e00\u6708\u3001\u661f\u671f\u4e2d\u7684\u54ea\u4e00\u5929\uff0c\u8fd8\u6709\u5b9a\u65f6\u6267\u884c\u7684\u547d\u4ee4\u3002
\n<\/span><\/p>\n

# m h dom mon dow command
\n<\/span><\/p>\n

\n\u00a0<\/p>\n

# * * * * * command to execute
\n<\/span><\/p>\n

# \u252c \u252c \u252c \u252c \u252c
\n<\/span><\/p>\n

# \u2502 \u2502 \u2502 \u2502 \u2502
\n<\/span><\/p>\n

# \u2502 \u2502 \u2502 \u2502 \u2502
\n<\/span><\/p>\n

# \u2502 \u2502 \u2502 \u2502 \u2514\u2500\u2500\u2500\u2500\u2500 <\/span>\u661f\u671f\u4e2d\u7684\u54ea\u4e00\u5929<\/span>(0-7)(<\/span>\u4ece<\/span>0<\/span>\u5230<\/span>6<\/span>\u4ee3\u8868\u661f\u671f\u65e5\u5230\u661f\u671f\u516d<\/span>,<\/span>\u4e5f\u53ef\u4ee5\u4f7f\u7528\u540d\u5b57<\/span>;7<\/span>\u662f\u661f\u671f\u5929<\/span>,<\/span>\u7b49\u540c\u4e8e<\/span>0)
\n<\/span><\/span><\/p>\n

# \u2502 \u2502 \u2502 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 <\/span>\u6708\u4efd<\/span> (1 – 12)
\n<\/span><\/span><\/p>\n

# \u2502 \u2502 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 <\/span>\u6708\u4efd\u4e2d\u7684\u65e5<\/span> (1 – 31)
\n<\/span><\/span><\/p>\n

# \u2502 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 <\/span>\u5c0f\u65f6<\/span> (0 – 23)
\n<\/span><\/span><\/p>\n

# \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 <\/span>\u5206\u949f<\/span> (0 – 59)
\n<\/span><\/span><\/p>\n

\u4f8b\u5982\uff1a
\n<\/span><\/p>\n

0 0 * * * \/home\/pi\/backup.sh
\n<\/span><\/p>\n

\u8fd9\u9879cron\u5b9e\u4f8b\u5c06\u4f1a\u5728\u6bcf\u4e00\u5929\u7684\u5348\u591c\u6267\u884cbackup.sh\u811a\u672c\u3002\u539f\u6587\u5730\u5740\uff1ahttp:\/\/www.rasp<\/span><\/a>berrypi.org\/documentation\/linux\/usage\/cron.md
\n<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Cron\u662fUnix\u7cfb\u7edf\u7684\u4e00\u4e2a\u914d…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,15],"tags":[],"class_list":["post-535","post","type-post","status-publish","format-standard","hentry","category-jishu","category-reapberry"],"_links":{"self":[{"href":"http:\/\/alextop.top\/index.php?rest_route=\/wp\/v2\/posts\/535"}],"collection":[{"href":"http:\/\/alextop.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/alextop.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/alextop.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/alextop.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=535"}],"version-history":[{"count":0,"href":"http:\/\/alextop.top\/index.php?rest_route=\/wp\/v2\/posts\/535\/revisions"}],"wp:attachment":[{"href":"http:\/\/alextop.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=535"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/alextop.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=535"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/alextop.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=535"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}