{"id":910,"date":"2013-09-17T15:26:26","date_gmt":"2013-09-17T07:26:26","guid":{"rendered":"http:\/\/hesiwei.cn\/?p=910"},"modified":"2013-09-17T15:26:26","modified_gmt":"2013-09-17T07:26:26","slug":"linux-crontab-%e5%ae%9a%e6%97%b6%e4%bb%bb%e5%8a%a1-%e5%91%bd%e4%bb%a4%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"http:\/\/hesiwei.cn\/?p=910","title":{"rendered":"Linux Crontab \u5b9a\u65f6\u4efb\u52a1 \u547d\u4ee4\u8be6\u89e3"},"content":{"rendered":"

\u4e00.\u00a0 Crontab\u00a0\u4ecb\u7ecd<\/p>\n

\n
\n
\n
\n

\u00a0<\/span>\u00a0 \u00a0 \u00a0 \u00a0crontab<\/span>\u547d\u4ee4\u7684\u529f\u80fd\u662f\u5728\u4e00\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u8c03\u5ea6\u4e00\u4e9b\u547d\u4ee4\u7684\u6267\u884c\u3002<\/span><\/p>\n

\u00a0<\/span>1.1 \/etc\/crontab\u00a0<\/span>\u6587\u4ef6<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u5728\/etc<\/span>\u76ee\u5f55\u4e0b\u6709\u4e00\u4e2acrontab<\/span>\u6587\u4ef6\uff0c\u8fd9\u91cc\u5b58\u653e\u6709\u7cfb\u7edf\u8fd0\u884c\u7684\u4e00\u4e9b\u8c03\u5ea6\u7a0b\u5e8f\u3002\u6bcf\u4e2a\u7528\u6237\u53ef\u4ee5\u5efa\u7acb\u81ea\u5df1\u7684\u8c03\u5ea6crontab<\/span>\u3002<\/p>\n

\u00a0<\/span>\u5982\uff1a<\/span><\/p>\n

[root@dave ~]# cat \/etc\/crontab<\/span><\/p>\n

SHELL=\/bin\/bash<\/span><\/p>\n

PATH=\/sbin:\/bin:\/usr\/sbin:\/usr\/bin<\/span><\/p>\n

MAILTO=root<\/span><\/p>\n

HOME=\/<\/span><\/p>\n

# run-parts<\/span><\/p>\n

01 * * * * root run-parts \/etc\/cron.hourly<\/span><\/p>\n

02 4 * * * root run-parts \/etc\/cron.daily<\/span><\/p>\n

22 4 * * 0 root run-parts \/etc\/cron.weekly<\/span><\/p>\n

42 4 1 * * root run-parts \/etc\/cron.monthly<\/span><\/p>\n

\u00a0<\/span><\/p>\n

1.2 \/etc\/cron.deny\u00a0<\/span>\u548c\u00a0\/etc\/cron.allow\u00a0<\/span>\u6587\u4ef6<\/p>\n

\u00a0<\/span><\/p>\n

\/etc\/cron.deny\u00a0<\/span>\u8868\u793a\u4e0d\u80fd\u4f7f\u7528crontab\u00a0<\/span>\u547d\u4ee4\u7684\u7528\u6237<\/p>\n

\/etc\/cron.allow\u00a0<\/span>\u8868\u793a\u80fd\u4f7f\u7528crontab<\/span>\u7684\u7528\u6237\u3002<\/p>\n

\u00a0<\/span><\/p>\n

\u5982\u679c\u4e24\u4e2a\u6587\u4ef6\u540c\u65f6\u5b58\u5728\uff0c\u90a3\u4e48\/etc\/cron.allow\u00a0<\/span>\u4f18\u5148\u3002<\/p>\n

\u5982\u679c\u4e24\u4e2a\u6587\u4ef6\u90fd\u4e0d\u5b58\u5728\uff0c\u90a3\u4e48\u53ea\u6709\u8d85\u7ea7\u7528\u6237\u53ef\u4ee5\u5b89\u6392\u4f5c\u4e1a\u3002<\/p>\n

\u00a0<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u6bcf\u4e2a\u7528\u6237\u90fd\u4f1a\u751f\u6210\u4e00\u4e2a\u81ea\u5df1\u7684crontab\u00a0<\/span>\u6587\u4ef6\u3002\u8fd9\u4e9b\u6587\u4ef6\u5728\/var\/spool\/cron<\/span>\u76ee\u5f55\u4e0b\uff1a<\/p>\n

\u00a0<\/span><\/p>\n

\u5982\uff1a<\/p>\n

[root@dave ~]# cd \/var\/spool\/cron<\/span><\/p>\n

[root@dave cron]# ls<\/span><\/p>\n

oracle\u00a0\u00a0root<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u6211\u4eec\u76f4\u63a5\u67e5\u770b\u8fd9\u4e2a\u6587\u4ef6\uff0c\u91cc\u9762\u7684\u5185\u5bb9\u548c\u5bf9\u5e94\u7528\u6237\u663e\u793a\u7684crontab -l\u00a0<\/span>\u4e00\u81f4\u3002<\/p>\n

[root@dave cron]# cat oracle<\/span><\/p>\n

00 6 * * * \/u02\/scripts\/del_st_archive.sh >\/u02\/scripts\/del_st_arch.log 2>&1<\/span><\/p>\n

[root@dave cron]# cat root<\/span><\/p>\n

0 12 * * * \/root\/bin\/sync-clock.sh<\/span><\/p>\n

[root@dave cron]#<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u4e8c.\u00a0\u00a0Crontab\u00a0<\/span>\u4f7f\u7528\u8bf4\u660e<\/p>\n

\u00a0<\/span><\/p>\n

2.1\u00a0\u00a0<\/span>Crontab<\/span>\u8bed\u6cd5<\/p>\n

usage:\u00a0\u00a0crontab [-u user] file<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0crontab [-u user] [ -e | -l | -r ]<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(default operation is replace, per 1003.2)<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-e\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(edit user’s crontab)<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-l\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(list user’s crontab)<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-r\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(delete user’s crontab)<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-i\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(prompt before deleting user’s crontab)<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-s\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(selinux context)<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u5176\u4e2d\uff0cfile<\/span>\u662f\u547d\u4ee4\u6587\u4ef6\u7684\u540d\u5b57\u3002\u5982\u679c\u5728\u547d\u4ee4\u884c\u4e2d\u6307\u5b9a\u4e86\u8fd9\u4e2a\u6587\u4ef6\uff0c\u90a3\u4e48\u6267\u884ccrontab<\/span>\u547d\u4ee4\uff0c\u5219\u5c06\u8fd9\u4e2a\u6587\u4ef6\u62f7\u8d1d\u5230crontabs<\/span>\u76ee\u5f55\u4e0b\uff1b\u5982\u679c\u5728\u547d\u4ee4\u884c\u4e2d\u6ca1\u6709\u5236\u5b9a\u8fd9\u4e2a\u6587\u4ef6\uff0ccrontab<\/span>\u547d\u4ee4\u5c06\u63a5\u53d7\u6807\u51c6\u8f93\u5165\uff08\u952e\u76d8\uff09\u4e0a\u952e\u5165\u7684\u547d\u4ee4\uff0c\u5e76\u5c06\u4ed6\u4eec\u4e5f\u5b58\u653e\u5728crontab<\/span>\u76ee\u5f55\u4e0b\u3002<\/p>\n

\u00a0<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u5e2e\u52a9\uff1a<\/p>\n

[root@dave ~]# man crontab<\/span><\/p>\n

CRONTAB(1)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0CRONTAB(1)<\/span><\/p>\n

\u00a0<\/span><\/p>\n

NAME<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0crontab – maintain crontab files for individual users (ISC Cron V4.1)<\/span><\/p>\n

\u00a0<\/span><\/p>\n

SYNOPSIS<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0crontab [-u user] file<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0crontab [-u user] [-l | -r | -e] [-i] [-s]<\/span><\/p>\n

\u00a0<\/span><\/p>\n

DESCRIPTION<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Crontab\u00a0\u00a0is the program used to install, deinstall or list the tables used to drive the cron(8) daemon in ISC Cron.\u00a0\u00a0Each user can have their own crontab,\u00a0\u00a0and\u00a0\u00a0though these\u00a0\u00a0are\u00a0\u00a0files in \/var\/spool\/ , they are not intended to be edited directly. For SELinux in mls mode can be even more crontabs\u00a0\u00a0–\u00a0\u00a0for\u00a0\u00a0each\u00a0\u00a0range.\u00a0\u00a0For\u00a0\u00a0more\u00a0\u00a0see selinux(8).<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0If\u00a0\u00a0the\u00a0\u00a0cron.allow\u00a0\u00a0file\u00a0\u00a0exists,\u00a0\u00a0then\u00a0\u00a0you must be listed therein in order to be allowed to use this command.\u00a0\u00a0If\u00a0\u00a0the\u00a0\u00a0cron.allow\u00a0\u00a0file\u00a0\u00a0does\u00a0\u00a0not\u00a0\u00a0exist\u00a0\u00a0but\u00a0\u00a0the cron.deny\u00a0\u00a0file\u00a0\u00a0does\u00a0\u00a0exist,\u00a0\u00a0then you must not be listed in the cron.deny file in order to use this command.\u00a0\u00a0If neither of these files exists, only the\u00a0\u00a0super\u00a0\u00a0user will be allowed to use this command.<\/span><\/p>\n

\u00a0<\/span><\/p>\n

OPTIONS<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-u\u00a0\u00a0\u00a0\u00a0\u00a0It\u00a0\u00a0specifies\u00a0\u00a0the name of the user whose crontab is to be tweaked.\u00a0\u00a0If this\u00a0\u00a0option is not given, crontab examines “your” crontab, i.e., the\u00a0\u00a0crontab\u00a0\u00a0of the\u00a0\u00a0person\u00a0\u00a0executing the command.\u00a0\u00a0Note that su(8) can confuse crontab and\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0that if you are running inside of su(8) you should always use the -u\u00a0\u00a0option\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0for\u00a0\u00a0safety\u00a1\u00afs sake.\u00a0\u00a0The first form of this command is used to install a new\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0crontab from some named file or standard input if the pseudo-filename “-” is\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0given.<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-l\u00a0\u00a0\u00a0\u00a0\u00a0The current crontab will be displayed on standard output.<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-r\u00a0\u00a0\u00a0\u00a0\u00a0The current crontab will be be removed.<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-e\u00a0\u00a0\u00a0\u00a0\u00a0This\u00a0\u00a0option\u00a0\u00a0is used to edit the current crontab using the editor specified by the VISUAL or EDITOR environment variables.\u00a0\u00a0After you exit from the edi-tor, the modified crontab will be installed automatically.<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-i\u00a0\u00a0\u00a0\u00a0\u00a0This\u00a0\u00a0option\u00a0\u00a0modifies the -r option to prompt the user for a \u00a1\u00afy\/Y\u00a1\u00af response before actually removing the crontab.<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0-s\u00a0\u00a0\u00a0\u00a0\u00a0It will append the current SELinux security context string as\u00a0\u00a0an\u00a0\u00a0MLS_LEVEL setting\u00a0\u00a0to\u00a0\u00a0the\u00a0\u00a0crontab file before editing \/ replacement occurs – see the documentation of MLS_LEVEL in crontab(5).<\/span><\/p>\n

\u00a0<\/span><\/p>\n

SEE ALSO<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0crontab(5), cron(8)<\/span><\/p>\n

FILES<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/etc\/cron.allow<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/etc\/cron.deny<\/span><\/p>\n

STANDARDS<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0The crontab command conforms to IEEE Std1003.2-1992 (\u00a1\u00ae\u00a1\u00aePOSIX\u00a1\u00af\u00a1\u00af).\u00a0\u00a0This new\u00a0\u00a0command syntax\u00a0\u00a0differs\u00a0\u00a0from\u00a0\u00a0previous versions of Vixie Cron, as well as from the classic<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0SVR3 syntax.<\/span><\/p>\n

DIAGNOSTICS<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0A fairly informative usage message appears if you run it with a bad command line.<\/span><\/p>\n

AUTHOR<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Paul Vixie <vixie@isc.org><\/span><\/p>\n

4th Berkeley Distribution\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a016 Januar 2007\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0CRONTAB(1)<\/span><\/p>\n

 <\/p>\n

2.2\u00a0\u00a0Crontab\u00a0<\/span>\u683c\u5f0f\u8bf4\u660e<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u6211\u4eec\u53ef\u4ee5\u7528crontab -e\u00a0<\/span>\u6dfb\u52a0\u8981\u6267\u884c\u7684\u547d\u4ee4\u3002 \u547d\u4ee4\u6267\u884c\u7684\u7ed3\u679c\uff0c\u65e0\u8bba\u662f\u6807\u51c6\u8f93\u51fa\u8fd8\u662f\u9519\u8bef\u8f93\u51fa\uff0c\u90fd\u5c06\u4ee5\u90ae\u4ef6\u5f62\u5f0f\u53d1\u7ed9\u7528\u6237\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/p>\n

\u00a0\u00a0\u00a0<\/span>\u6dfb\u52a0\u7684\u547d\u4ee4\u5fc5\u987b\u4ee5\u5982\u4e0b\u683c\u5f0f\uff1a<\/p>\n

\u00a0\u00a0\u00a0* * * * * \/command path<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u524d\u4e94\u4e2a\u5b57\u6bb5\u53ef\u4ee5\u53d6\u6574\u6570\u503c\uff0c\u6307\u5b9a\u4f55\u65f6\u5f00\u59cb\u5de5\u4f5c\uff0c\u7b2c\u516d\u4e2a\u57df\u662f\u5b57\u7b26\u4e32\uff0c\u5373\u547d\u4ee4\u5b57\u6bb5\uff0c\u5176\u4e2d\u5305\u62ec\u4e86crontab<\/span>\u8c03\u5ea6\u6267\u884c\u7684\u547d\u4ee4\u3002 \u5404\u4e2a\u5b57\u6bb5\u4e4b\u95f4\u7528spaces<\/span>\u548ctabs<\/span>\u5206\u5272\u3002<\/p>\n

\u00a0<\/span><\/p>\n

\u524d5<\/span>\u4e2a\u5b57\u6bb5\u5206\u522b\u8868\u793a\uff1a<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u5206\u949f\uff1a0-59<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u5c0f\u65f6\uff1a1-23<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u65e5\u671f\uff1a1-31<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u6708\u4efd\uff1a1-12<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u661f\u671f\uff1a0-6<\/span>\uff080<\/span>\u8868\u793a\u5468\u65e5\uff09<\/p>\n

\u00a0<\/span><\/p>\n

\u8fd8\u53ef\u4ee5\u7528\u4e00\u4e9b\u7279\u6b8a\u7b26\u53f7\uff1a<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0*<\/span>\uff1a \u8868\u793a\u4efb\u4f55\u65f6\u523b<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0,<\/span>\uff1a\u3000\u8868\u793a\u5206\u5272<\/p>\n

\uff0d\uff1a\u8868\u793a\u4e00\u4e2a\u6bb5\uff0c\u5982\u7b2c\u4e8c\u7aef\u91cc\uff1a\u00a01-5<\/span>\uff0c\u5c31\u8868\u793a1<\/span>\u52305<\/span>\u70b9<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/n :\u00a0<\/span>\u8868\u793a\u6bcf\u4e2an<\/span>\u7684\u5355\u4f4d\u6267\u884c\u4e00\u6b21\uff0c\u5982\u7b2c\u4e8c\u6bb5\u91cc\uff0c*\/1,\u00a0<\/span>\u5c31\u8868\u793a\u6bcf\u96941<\/span>\u4e2a\u5c0f\u65f6\u6267\u884c\u4e00\u6b21\u547d\u4ee4\u3002\u4e5f\u53ef\u4ee5\u5199\u62101-23\/1.<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u4e00\u4e9b\u793a\u4f8b\uff1a<\/p>\n

00 8,12,16 * * * \/data\/app\/scripts\/monitor\/df.sh<\/span><\/p>\n

30 2 * * * \/data\/app\/scripts\/hotbackup\/hot_database_backup.sh<\/span><\/p>\n

10 8,12,16 * * * \/data\/app\/scripts\/monitor\/check_ind_unusable.sh<\/span><\/p>\n

10 8,12,16 * * * \/data\/app\/scripts\/monitor\/check_maxfilesize.sh<\/span><\/p>\n

10 8,12,16 * * * \/data\/app\/scripts\/monitor\/check_objectsize.sh<\/span><\/p>\n

\u00a0<\/span><\/p>\n

43 21 * * * 21:43\u00a0<\/span>\u6267\u884c<\/p>\n

15 05 * * *\u00a0<\/span>\u3000\u3000\u00a005:15\u00a0<\/span>\u6267\u884c<\/p>\n

0 17 * * * 17:00\u00a0<\/span>\u6267\u884c<\/p>\n

0 17 * * 1\u00a0<\/span>\u6bcf\u5468\u4e00\u7684\u00a017:00\u00a0<\/span>\u6267\u884c<\/p>\n

0,10 17 * * 0,2,3\u00a0<\/span>\u6bcf\u5468\u65e5,<\/span>\u5468\u4e8c,<\/span>\u5468\u4e09\u7684\u00a017:00<\/span>\u548c\u00a017:10\u00a0<\/span>\u6267\u884c<\/p>\n

0-10 17 1 * *\u00a0<\/span>\u6bce\u67081<\/span>\u65e5\u4ece\u00a017:00<\/span>\u52307:10\u00a0<\/span>\u6bce\u96941<\/span>\u5206\u949f \u6267\u884c<\/p>\n

0 0 1,15 * 1\u00a0<\/span>\u6bce\u67081<\/span>\u65e5\u548c\u00a015<\/span>\u65e5\u548c \u4e00\u65e5\u7684\u00a00:00\u00a0<\/span>\u6267\u884c<\/p>\n

42 4 1 * *\u00a0<\/span>\u3000 \u3000 \u6bce\u67081<\/span>\u65e5\u7684\u00a04:42<\/span>\u5206 \u6267\u884c<\/p>\n

0 21 * * 1-6<\/span>\u3000\u3000 \u5468\u4e00\u5230\u5468\u516d\u00a021:00\u00a0<\/span>\u6267\u884c<\/p>\n

0,10,20,30,40,50 * * * *<\/span>\u3000\u6bcf\u969410<\/span>\u5206 \u6267\u884c<\/p>\n

*\/10 * * * *\u00a0<\/span>\u3000\u3000\u3000\u3000\u3000\u3000 \u6bcf\u969410<\/span>\u5206 \u6267\u884c<\/p>\n

* 1 * * *<\/span>\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000 \u4ece1:0<\/span>\u52301:59\u00a0<\/span>\u6bcf\u96941<\/span>\u5206\u949f \u6267\u884c<\/p>\n

0 1 * * *<\/span>\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u00a01:00\u00a0<\/span>\u6267\u884c<\/p>\n

0 *\/1 * * *<\/span>\u3000\u3000\u3000\u3000\u3000\u3000\u3000 \u6bce\u65f60<\/span>\u5206 \u6bcf\u96941<\/span>\u5c0f\u65f6 \u6267\u884c<\/p>\n

0 * * * *<\/span>\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000 \u6bce\u65f60<\/span>\u5206 \u6bcf\u96941<\/span>\u5c0f\u65f6 \u6267\u884c<\/p>\n

2 8-20\/3 * * *<\/span>\u3000\u3000\u3000\u3000\u3000\u30008:02,11:02,14:02,17:02,20:02\u00a0<\/span>\u6267\u884c<\/p>\n

30 5 1,15 * *<\/span>\u3000\u3000\u3000\u3000\u3000\u3000\u00a01<\/span>\u65e5 \u548c\u00a015<\/span>\u65e5\u7684\u00a05:30\u00a0<\/span>\u6267\u884c<\/p>\n

\u00a0<\/span><\/p>\n

\u00a0<\/span><\/p>\n

2.3\u00a0\u00a0&\u00a0<\/span>\u540e\u53f0\u6267\u884c\u547d\u4ee4<\/p>\n

\u00a0<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u5f53\u5728\u524d\u53f0\u8fd0\u884c\u67d0\u4e2a\u4f5c\u4e1a\u65f6\uff0c\u7ec8\u7aef\u88ab\u8be5\u4f5c\u4e1a\u5360\u636e\uff1b\u800c\u5728\u540e\u53f0\u8fd0\u884c\u4f5c\u4e1a\u65f6\uff0c\u5b83\u4e0d\u4f1a\u5360\u636e\u7ec8\u7aef\u3002\u53ef\u4ee5\u4f7f\u7528&<\/span>\u547d\u4ee4\u628a\u4f5c\u4e1a\u653e\u5230\u540e\u53f0\u6267\u884c\u3002<\/p>\n

\u00a0<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u5982\uff1a<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a030 2 * * * \/data\/app\/scripts\/hotbackup\/hot_database_backup.sh &<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u5728\u540e\u53f0\u8fd0\u884c\u4f5c\u4e1a\u65f6\u8981\u5f53\u5fc3\uff1a\u9700\u8981\u7528\u6237\u4ea4\u4e92\u7684\u547d\u4ee4\u4e0d\u8981\u653e\u5728\u540e\u53f0\u6267\u884c\uff0c\u56e0\u4e3a\u8fd9\u6837\u4f60\u7684\u673a\u5668\u5c31\u4f1a\u5728\u90a3\u91cc\u50bb\u7b49\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u4e0d\u8fc7\uff0c\u4f5c\u4e1a\u5728\u540e\u53f0\u8fd0\u884c\u4e00\u6837\u4f1a\u5c06\u7ed3\u679c\u8f93\u51fa\u5230\u5c4f\u5e55\u4e0a\uff0c\u5e72\u6270\u4f60\u7684\u5de5\u4f5c\u3002\u5982\u679c\u653e\u5728\u540e\u53f0\u8fd0\u884c\u7684\u4f5c\u4e1a\u4f1a\u4ea7\u751f\u5927\u91cf\u7684\u8f93\u51fa\uff0c\u6700\u597d\u4f7f\u7528\u4e0b\u9762\u7684\u65b9\u6cd5\u628a\u5b83\u7684\u8f93\u51fa\u91cd\u5b9a\u5411\u5230\u67d0\u4e2a\u6587\u4ef6\u4e2d\uff1a<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u5982\uff1a<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0command >out.file 2>&1 &<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c2>&1<\/span>\u8868\u793a\u6240\u6709\u7684\u6807\u51c6\u8f93\u51fa\u548c\u9519\u8bef\u8f93\u51fa\u90fd\u5c06\u88ab\u91cd\u5b9a\u5411\u5230\u4e00\u4e2a\u53eb\u505aout.file\u00a0<\/span>\u7684\u6587\u4ef6\u4e2d\u3002<\/p>\n

\u00a0<\/span><\/p>\n

2.4\u00a0\u00a0<\/span>2>&1\u00a0<\/span>\u542b\u4e49<\/p>\n

\u00a0<\/span><\/p>\n

\u5148\u770b\u4e00\u4e2a\u4f8b\u5b50\uff1a<\/p>\n

0 2 * * * \/u01\/test.sh >\/dev\/null 2>&1 &<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u8fd9\u53e5\u8bdd\u7684\u610f\u601d\u5c31\u662f\u5728\u540e\u53f0\u6267\u884c\u8fd9\u6761\u547d\u4ee4\uff0c\u5e76\u5c06\u9519\u8bef\u8f93\u51fa2<\/span>\u91cd\u5b9a\u5411\u5230\u6807\u51c6\u8f93\u51fa1<\/span>\uff0c\u7136\u540e\u5c06\u6807\u51c6\u8f93\u51fa1<\/span>\u5168\u90e8\u653e\u5230\/dev\/null\u00a0<\/span>\u6587\u4ef6\uff0c\u4e5f\u5c31\u662f\u6e05\u7a7a\u3002<\/p>\n

\u00a0<\/span><\/p>\n

\u5728\u8fd9\u91cc\u6709\u6709\u51e0\u4e2a\u6570\u5b57\u7684\u610f\u601d\uff1a<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a00<\/span>\u8868\u793a\u952e\u76d8\u8f93\u5165<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a01<\/span>\u8868\u793a\u6807\u51c6\u8f93\u51fa<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a02<\/span>\u8868\u793a\u9519\u8bef\u8f93\u51fa.<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u6211\u4eec\u4e5f\u53ef\u4ee5\u8fd9\u6837\u5199\uff1a<\/p>\n

0 2 * * * \/u01\/test.sh\u00a0\u00a0>\/u01\/out.file &\u00a0\u00a0—<\/span>\u8fd9\u91cc\u6ca1\u5199\uff0c\u9ed8\u8ba4\u662f1<\/span><\/p>\n

0 2 * * * \/u01\/test.sh\u00a0\u00a01>\/u01\/out.file &<\/span><\/p>\n

0 2 * * * \/u01\/test.sh\u00a0\u00a02>\/u01\/out.file &<\/span><\/p>\n

0 2 * * * \/u01\/test.sh\u00a0\u00a02>\/u01\/out.file\u00a0\u00a02>&1 &<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u5c06tesh.sh\u00a0<\/span>\u547d\u4ee4\u8f93\u51fa\u91cd\u5b9a\u5411\u5230out.file,\u00a0<\/span>\u5373\u8f93\u51fa\u5185\u5bb9\u4e0d\u6253\u5370\u5230\u5c4f\u5e55\u4e0a\uff0c\u800c\u662f\u8f93\u51fa\u5230out.file<\/span>\u6587\u4ef6\u4e2d\u3002<\/p>\n

\u00a0<\/span><\/p>\n

2>&1\u00a0<\/span>\u662f\u5c06\u9519\u8bef\u8f93\u51fa\u91cd\u5b9a\u5411\u5230\u6807\u51c6\u8f93\u51fa\u3002 \u7136\u540e\u5c06\u6807\u51c6\u8f93\u5165\u91cd\u5b9a\u5411\u5230\u6587\u4ef6out.file<\/span>\u3002<\/p>\n

&1\u00a0<\/span>\u8868\u793a\u7684\u662f\u6587\u4ef6\u63cf\u8ff01<\/span>\uff0c\u8868\u793a\u6807\u51c6\u8f93\u51fa\uff0c\u5982\u679c\u8fd9\u91cc\u5c11\u4e86&<\/span>\u5c31\u6210\u4e86\u6570\u5b571<\/span>\uff0c\u5c31\u8868\u793a\u91cd\u5b9a\u5411\u5230\u6587\u4ef61<\/span>\u3002<\/p>\n

\u00a0<\/span><\/p>\n

&\u00a0<\/span>\uff1a\u540e\u53f0\u6267\u884c<\/p>\n

\u00a0<\/span><\/p>\n

\u6d4b\u8bd5\uff1a<\/p>\n

ls 2>1\u00a0<\/span>\uff1a \u4e0d\u4f1a\u62a5\u6ca1\u67092<\/span>\u6587\u4ef6\u7684\u9519\u8bef\uff0c\u4f46\u4f1a\u8f93\u51fa\u4e00\u4e2a\u7a7a\u7684\u6587\u4ef61<\/span>\uff1b<\/p>\n

ls xxx 2>1<\/span>\uff1a \u6ca1\u6709xxx<\/span>\u8fd9\u4e2a\u6587\u4ef6\u7684\u9519\u8bef\u8f93\u51fa\u5230\u4e861<\/span>\u4e2d\uff1b<\/p>\n

ls xxx 2>&1<\/span>\uff1a \u4e0d\u4f1a\u751f\u62101<\/span>\u8fd9\u4e2a\u6587\u4ef6\u4e86\uff0c\u4e0d\u8fc7\u9519\u8bef\u8dd1\u5230\u6807\u51c6\u8f93\u51fa\u4e86\uff1b<\/p>\n

ls xxx >out.txt 2>&1 == ls xxx 1>out.txt 2>&1<\/span>\uff1b\u00a0\u00a0\u56e0\u4e3a\u91cd\u5b9a\u5411\u7b26\u53f7><\/span>\u9ed8\u8ba4\u662f1<\/span>\uff0c\u8fd9\u53e5\u5c31\u628a\u9519\u8bef\u8f93\u51fa\u548c\u6807\u51c6\u8f93\u51fa\u90fd\u4f20\u5230out.txt\u00a0<\/span>\u6587\u4ef6\u4e2d\u3002<\/p>\n

\u00a0<\/span><\/p>\n

\u00a0<\/span><\/p>\n

2.5\u00a0\u00a02>&1<\/span>\u5199\u5728\u540e\u9762\u7684\u539f\u56e0<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u683c\u5f0f\uff1acommand > file 2>&1\u00a0\u00a0\u00a0== command\u00a0\u00a01> file 2>&1<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\u9996\u5148\u662fcommand > file<\/span>\u5c06\u6807\u51c6\u8f93\u51fa\u91cd\u5b9a\u5411\u5230file<\/span>\u4e2d\uff0c\u00a02>&1\u00a0<\/span>\u662f\u6807\u51c6\u9519\u8bef\u62f7\u8d1d\u4e86\u6807\u51c6\u8f93\u51fa\uff0c\u4e5f\u5c31\u662f\u540c\u6837\u88ab\u91cd\u5b9a\u5411\u5230file<\/span>\u4e2d\uff0c\u6700\u7ec8\u7ed3\u679c\u5c31\u662f\u6807\u51c6\u8f93\u51fa\u548c\u9519\u8bef\u90fd\u88ab\u91cd\u5b9a\u5411\u5230file<\/span>\u4e2d\u3002<\/p>\n

\u00a0<\/span><\/p>\n

\u5982\u679c\u6539\u6210\uff1a\u00a0command 2>&1 >file<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a02>&1\u00a0<\/span>\u6807\u51c6\u9519\u8bef\u62f7\u8d1d\u4e86\u6807\u51c6\u8f93\u51fa\u7684\u884c\u4e3a\uff0c\u4f46\u6b64\u65f6\u6807\u51c6\u8f93\u51fa\u8fd8\u662f\u5728\u7ec8\u7aef\u3002>file\u00a0<\/span>\u540e\u8f93\u51fa\u624d\u88ab\u91cd\u5b9a\u5411\u5230file<\/span>\uff0c\u4f46\u6807\u51c6\u9519\u8bef\u4ecd\u7136\u4fdd\u6301\u5728\u7ec8\u7aef\u3002<\/p>\n

\u00a0\u8f6c\u81ea<\/span>David Dai<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\u4e00.\u00a0 Crontab\u00a0\u4ecb\u7ecd \u00a0\u00a0 \u00a0 \u00a0 \u00a0crontab\u547d\u4ee4\u7684\u529f\u80fd\u662f\u5728\u4e00\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u8c03\u5ea6\u4e00\u4e9b\u547d\u4ee4\u7684\u6267\u884c\u3002 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":["post-910","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"http:\/\/hesiwei.cn\/index.php?rest_route=\/wp\/v2\/posts\/910","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/hesiwei.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/hesiwei.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/hesiwei.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/hesiwei.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=910"}],"version-history":[{"count":0,"href":"http:\/\/hesiwei.cn\/index.php?rest_route=\/wp\/v2\/posts\/910\/revisions"}],"wp:attachment":[{"href":"http:\/\/hesiwei.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=910"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/hesiwei.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=910"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/hesiwei.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=910"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}