cron \u5728 Linux \u8bbe\u7f6e<\/strong><\/div>\n
cron - \u662f\u4e00\u4e2a\u7528\u4e8e\u8fd0\u884c\u8ba1\u5212\u4efb\u52a1\u5982\u7cfb\u7edf\u5907\u4efd\u3001\u66f4\u65b0\u7b49\u7684\u5b88\u62a4\u8fdb\u7a0b\u3002\u5b83\u9002\u5408\u5728\u90a3\u4e9b 24X7 \u4e0d\u95f4\u65ad\u8fd0\u884c\u7684\u673a\u5668\u5982\u670d\u52a1\u5668\u4e0a\u8fd0\u884c\u7684\u8ba1\u5212\u4efb\u52a1\u3002<\/p>\n
\u547d\u4ee4\/\u811a\u672c\u88ab\u5199\u5728 cron \u4efb\u52a1\u811a\u672c\u4e2d\uff0c\u5b83\u662f\u5728crontab<\/span> \u6587\u4ef6\u4e2d\u88ab\u5b89\u6392\u7684\u3002\u7cfb\u7edf\u9ed8\u8ba4\u7684 cromtab<\/span> \u6587\u4ef6\u662f\/etc\/crontab<\/span> \uff0c\u4f46\u662f\u6bcf\u4e2a\u7528\u6237\u4e5f\u53ef\u4ee5\u521b\u5efa\u81ea\u5df1\u7684 cromtab<\/span> \u6587\u4ef6\u6765\u5728\u7279\u5b9a\u65f6\u95f4\u8fd0\u884c\u7528\u6237\u5b9a\u4e49\u7684\u547d\u4ee4\u3002<\/p>\n
\u8981\u521b\u5efa\u4e00\u4efd\u4e2a\u4ebacrontab<\/span> \u6587\u4ef6\uff0c\u53ea\u8981\u8f93\u5165\uff1a<\/p>\n
$ crontab -e\r\n<\/pre>\n
$\"\"$ <\/p>\n
\u5982\u4f55\u5728 Linux \u4e2d\u8bbe\u7f6e anacron<\/strong><\/div>\n
anacron \u7528\u4e8e\u4ee5\u5929\u4e3a\u5355\u4f4d\u7684\u9891\u7387\u8fd0\u884c\u547d\u4ee4\u3002\u5b83\u7684\u5de5\u4f5c\u4e0e cron \u7a0d\u6709\u4e0d\u540c\uff0c\u5b83\u5047\u8bbe\u673a\u5668\u4e0d\u4f1a\u4e00\u76f4\u5f00\u673a<\/strong>\u3002<\/p>\n
cron \u4e5f\u9002\u5408\u5728\u90a3\u4e9b\u4e0d\u4f1a 24X7 \u8fd0\u884c\u5982\u7b14\u8bb0\u672c\u4ee5\u53ca\u684c\u9762\u7535\u8111\u7684\u673a\u5668\u4e0a\u8fd0\u884c\u6bcf\u65e5\u3001\u6bcf\u5468\u4ee5\u53ca\u6bcf\u6708\u7684\u8ba1\u5212\u4efb\u52a1\uff08LCTT \u8bd1\u6ce8\uff1a\u4e0d\u9002\u5408\u6309\u5c0f\u65f6\u3001\u5206\u949f\u6267\u884c\u4efb\u52a1\uff09\u3002<\/p>\n
\u5047\u8bbe\u4f60\u6709\u4e00\u4e2a\u8ba1\u5212\u4efb\u52a1\uff08\u6bd4\u5982\u5907\u4efd\u811a\u672c\uff09\u8981\u4f7f\u7528 cron \u5728\u6bcf\u5929\u534a\u591c\u8fd0\u884c\uff0c\u4e5f\u8bb8\u4f60\u4ee5\u53ca\u7761\u7740\uff0c\u90a3\u65f6\u4f60\u7684\u684c\u9762\/\u7b14\u8bb0\u672c\u7535\u8111\u5df2\u7ecf\u5173\u673a\u3002\u4f60\u7684\u5907\u4efd\u811a\u672c\u5c31\u4e0d\u4f1a\u88ab\u8fd0\u884c\u3002<\/p>\n
\u7136\u800c\uff0c\u5982\u679c\u4f60\u4f7f\u7528 anacron\uff0c\u4f60\u53ef\u4ee5\u786e\u4fdd\u5728\u4f60\u4e0b\u6b21\u5f00\u542f\u684c\u9762\/\u7b14\u8bb0\u672c\u7535\u8111\u7684\u65f6\u5019\uff0c\u5907\u4efd\u811a\u672c\u4f1a\u88ab\u6267\u884c\u3002<\/p>\n
anacron \u5982\u4f55\u5728 Linux \u5de5\u4f5c<\/strong><\/div>\n
anacron \u4efb\u52a1\u88ab\u5217\u5728 \/etc\/anacrontab<\/span> \u4e2d\uff0c\u4efb\u52a1\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u683c\u5f0f\uff08anacron \u6587\u4ef6\u4e2d\u7684\u6ce8\u91ca\u5fc5\u987b\u4ee5 #<\/span> \u53f7\u5f00\u59cb\uff09\u5b89\u6392\u3002<\/p>\n
period delay job-identifier command\r\n<\/pre>\n
\u4ece\u4e0a\u9762\u7684\u683c\u5f0f\u4e2d\uff1a<\/p>\n
\n
period<\/span> - \u8fd9\u662f\u4efb\u52a1\u7684\u9891\u7387\uff0c\u4ee5\u5929\u6765\u6307\u5b9a\uff0c\u6216\u8005\u662f@daily<\/span> \u3001@weekly<\/span>\u3001@monthly<\/span> \u4ee3\u8868\u6bcf\u5929\u3001\u6bcf\u5468\u3001\u6bcf\u6708\u4e00\u6b21\u3002\u4f60\u4e5f\u53ef\u4ee5\u4f7f\u7528\u6570\u5b57\uff1a1<\/span> - \u6bcf\u5929\u30017<\/span> - \u6bcf\u5468\u300130<\/span>- \u6bcf\u6708\uff0c\u6216\u8005N<\/span> - \u51e0\u5929\u3002<\/li>\n
delay<\/span> - \u8fd9\u662f\u5728\u6267\u884c\u4e00\u4e2a\u4efb\u52a1\u524d\u7b49\u5f85\u7684\u5206\u949f\u6570\u3002<\/li>\n
job-id<\/span> - \u8fd9\u662f\u5199\u5728\u65e5\u5fd7\u6587\u4ef6\u4e2d\u4efb\u52a1\u7684\u72ec\u7279\u540d\u5b57\u3002<\/li>\n
command<\/span> - \u8fd9\u662f\u8981\u6267\u884c\u7684\u547d\u4ee4\u6216 shell \u811a\u672c\u3002<\/li>\n<\/ul>\n
\u8981\u6d4f\u89c8\u793a\u4f8b\u6587\u4ef6\uff0c\u8f93\u5165\uff1a<\/p>\n
$ ls -l \/var\/spool\/anacron\/\r\ntotal 12\r\n-rw------- 1 root root 9 Jun 1 10:25 cron.daily\r\n-rw------- 1 root root 9 May 27 11:01 cron.monthly\r\n-rw------- 1 root root 9 May 30 10:28 cron.weekly\r\n<\/pre>\n
\u8fd9\u662f\u5b9e\u9645\u53d1\u751f\u7684\uff1a<\/p>\n
\n
anacron \u4f1a\u68c0\u67e5\u4efb\u52a1\u662f\u5426\u5df2\u7ecf\u5728 period<\/span> \u5b57\u6bb5\u6307\u5b9a\u7684\u65f6\u95f4\u88ab\u88ab\u6267\u884c\u4e86\u3002\u5982\u679c\u6ca1\u6709\uff0c\u5219\u5728\u7b49\u5f85 delay<\/span> \u5b57\u6bb5\u4e2d\u6307\u5b9a\u7684\u5206\u949f\u6570\u540e\uff0c\u6267\u884c command<\/span>\u5b57\u6bb5\u4e2d\u6307\u5b9a\u7684\u547d\u4ee4\u3002<\/li>\n
\u4e00\u65e6\u4efb\u52a1\u88ab\u6267\u884c\u4e86\uff0c\u5b83\u4f1a\u4f7f\u7528 job-id<\/span> \uff08\u65f6\u95f4\u6233\u6587\u4ef6\u540d\uff09\u5b57\u6bb5\u4e2d\u6307\u5b9a\u7684\u540d\u79f0\u5c06\u65e5\u671f\u8bb0\u5f55\u5728 \/var\/spool\/anacron<\/span> \u76ee\u5f55\u4e2d\u7684\u65f6\u95f4\u6233\u6587\u4ef6\u4e2d\u3002<\/li>\n<\/ul>\n
\u73b0\u5728\u8ba9\u6211\u4eec\u770b\u4e00\u4e2a\u4f8b\u5b50\u3002\u8fd9\u4e2a\u4f1a\u6bcf\u5929\u8fd0\u884c \/home\/aaronkilik\/bin\/backup.sh<\/span> \u811a\u672c\uff1a<\/p>\n
@daily 10 example.daily \/bin\/bash \/home\/aaronkilik\/bin\/backup.sh\r\n<\/pre>\n
\u5f53\u673a\u5668\u5728 backup.sh<\/span> \u671f\u671b\u88ab\u8fd0\u884c\u65f6\u662f\u5173\u673a\u7684\uff0canacron \u4f1a\u5728\u673a\u5668\u5f00\u673a\u5341\u5206\u949f\u4e4b\u540e\u8fd0\u884c\u5b83\uff0c\u800c\u4e0d\u7528\u518d\u7b49\u5f85 7 \u5929\u3002<\/p>\n
\u8fd9\u91cc\u6709\u4e24\u4e2a\u4f60\u5e94\u8be5\u7406\u89e3\u7684 anacrontab \u6587\u4ef6\u7684\u91cd\u8981\u53d8\u91cf\uff1a<\/p>\n
\n
START_HOURS_RANGE<\/span> - \u8fd9\u4e2a\u8bbe\u7f6e\u4efb\u52a1\u5f00\u59cb\u8fd0\u884c\u7684\u65f6\u95f4\u8303\u56f4\uff08\u4e5f\u5c31\u662f\u4efb\u52a1\u53ea\u5728\u8fd9\u51e0\u4e2a\u5c0f\u65f6\u5185\u8fd0\u884c\uff09\u3002<\/li>\n
RANDOM_DELAY<\/span> - \u8fd9\u5b9a\u4e49\u6dfb\u52a0\u5230\u7528\u6237\u5b9a\u4e49\u7684\u4efb\u52a1\u5ef6\u8fdf\u7684\u6700\u5927\u968f\u673a\u5ef6\u8fdf\uff08\u9ed8\u8ba4\u4e3a 45\uff09\u3002<\/li>\n<\/ul>\n
\u8fd9\u662f\u4f60\u7684 anacrontab \u6587\u4ef6\u53ef\u80fd\u770b\u4e0a\u53bb\u7684\u6837\u5b50\u3002<\/p>\n
Anacron \u2013 \/etc\/anacrontab<\/span> \uff1a<\/p>\n
# \/etc\/anacrontab: configuration file for anacron\r\n# See anacron(8) and anacrontab(5) for details.\r\nSHELL=\/bin\/sh\r\nPATH=\/usr\/local\/sbin:\/usr\/local\/bin:\/sbin:\/bin:\/usr\/sbin:\/usr\/bin\r\nHOME=\/root\r\nLOGNAME=root\r\n# These replace cron's entries\r\n1 5 cron.daily run-parts --report \/etc\/cron.daily\r\n7 10 cron.weekly run-parts --report \/etc\/cron.weekly\r\n@monthly 15 cron.monthly run-parts --report \/etc\/cron.monthly\r\n@daily 10 example.daily \/bin\/bash \/home\/aaronkilik\/bin\/backup.sh \r\n<\/pre>\n
\u4e0b\u9762\u662f cron \u4ee5\u53ca anacron \u7684\u6bd4\u8f83\uff0c\u5e2e\u52a9\u4f60\u7406\u89e3\u4f55\u65f6\u7528\u4ed6\u4eec\u5176\u4e2d\u4e00\u4e2a\u3002<\/p>\n\n\n\n\n\n\n\n\n\n
cron<\/th>\n anacron<\/th>\n<\/tr>\n<\/thead>\n
\u5b83\u662f\u5b88\u62a4\u8fdb\u7a0b<\/td>\n \u5b83\u4e0d\u662f\u5b88\u62a4\u8fdb\u7a0b<\/td>\n<\/tr>\n
\u9002\u5408\u670d\u52a1\u5668<\/td>\n \u9002\u5408\u684c\u9762\/\u7b14\u8bb0\u672c\u7535\u8111<\/td>\n<\/tr>\n
\u53ef\u4ee5\u8ba9\u4f60\u4ee5\u5206\u949f\u7ea7\u8fd0\u884c\u8ba1\u5212\u4efb\u52a1<\/td>\n \u53ea\u80fd\u8ba9\u4f60\u4ee5\u5929\u4e3a\u57fa\u7840\u6765\u8fd0\u884c\u8ba1\u5212\u4efb\u52a1<\/td>\n<\/tr>\n
\u5173\u673a\u65f6\u4e0d\u4f1a\u6267\u884c\u8ba1\u5212\u4efb\u52a1<\/td>\n \u5982\u679c\u8ba1\u5212\u4efb\u52a1\u5230\u671f\uff0c\u673a\u5668\u662f\u5173\u673a\u7684\uff0c\u90a3\u4e48\u5b83\u4f1a\u5728\u673a\u5668\u4e0b\u6b21\u5f00\u673a\u540e\u6267\u884c\u8ba1\u5212\u4efb\u52a1<\/td>\n<\/tr>\n
\u666e\u901a\u7528\u6237\u548c root \u7528\u6237\u90fd\u53ef\u4ee5\u4f7f\u7528<\/td>\n \u53ea\u6709 root \u7528\u6237\u53ef\u4ee5\u4f7f\u7528\uff08\u4f7f\u7528\u7279\u5b9a\u7684\u914d\u7f6e\u542f\u52a8\u666e\u901a\u4efb\u52a1\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
cron \u548c anacron \u4e3b\u8981\u7684\u533a\u522b\u5728\u4e8e cron \u80fd\u5728\u90a3\u4e9b\u6301\u7eed\u8fd0\u884c\u7684\u673a\u5668\u4e0a\u6709\u6548\u5730\u8fd0\u884c\uff0c\u800c anacron \u662f\u9488\u5bf9\u90a3\u4e9b\u4f1a\u5728\u4e00\u5929\u5185\u6216\u8005\u4e00\u5468\u5185\u4f1a\u5173\u673a\u7684\u673a\u5668\u3002<\/p>\n
\u5982\u679c\u4f60\u8fd8\u77e5\u9053\u5176\u4ed6\u65b9\u5f0f\uff0c\u8bf7\u5728\u8bc4\u8bba\u680f\u4e2d\u4e0e\u6211\u4eec\u5206\u4eab\u3002<\/p>\n
\n
\u539f\u6587\u5730\u5740\uff1a https:\/\/www.tecmint.com\/cron-vs-anacron-schedule-jobs-using-anacron-on-linux\/<\/a>\u200e<\/p>\n
\u672c\u6587\u5730\u5740\uff1a http:\/\/lrxjmw.cn\/cron-anacron-work<\/span>.html<\/span> <\/a>\u200e\u7f16\u8f91\u5458\uff1a\u5f20\u96c4\uff0c\u5ba1\u6838\u5458\uff1a\u9004\u589e\u5b9d<\/span><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"
\u5728\u672c\u7bc7\u4e2d\uff0c\u6211\u4eec\u4f1a\u89e3\u91ca cron \u548c anacron\uff0c\u5e76\u5411\u4f60\u5c55\u793a\u5982\u4f55\u5728 Linux \u4e2d\u8bbe\u7f6e anacron\u3002\u6211\u4eec\u4e5f\u4f1a\u6bd4\u8f83\u8fd9\u4e24\u4e2a\u5de5\u5177\u3002<\/p>\n","protected":false},"author":643,"featured_media":75112,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[55],"tags":[],"class_list":["post-74902","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-thread"],"acf":[],"_links":{"self":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/74902","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/users\/643"}],"replies":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/comments?post=74902"}],"version-history":[{"count":10,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/74902\/revisions"}],"predecessor-version":[{"id":75228,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/74902\/revisions\/75228"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media\/75112"}],"wp:attachment":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media?parent=74902"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/categories?post=74902"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/tags?post=74902"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}