经常用，但是经常忘记，基本的格式能记得，但是详细的或者复杂点的格式总会忘记或者拿不准，不知道是不是年纪大了记忆力下降，干脆整理出来今后方便查看。
基本格式 :
* * * * * command
分 时 日 月 周 命令
第1列表示分钟1～59 每分钟用*或者 */1表示
第2列表示小时1～23（0表示0点）
第3列表示日期1～31
第4列表示月份1～12
第5列标识号星期0～6（0表示星期天）
第6列要运行的命令
crontab文件的一些例子：
30 21 * * * /usr/local/etc/rc.d/lighttpd restart
上面的例子表示每晚的21:30重启lighttpd 。
45 4 1,10,22 * * /usr/local/etc/rc.d/lighttpd restart
上面的例子表示每月1、10、22日的4 : 45重启lighttpd 。
10 1 * * 6,0 /usr/local/etc/rc.d/lighttpd restart
上面的例子表示每周六、周日的1 : 10重启lighttpd 。
0,30 18-23 * * * /usr/local/etc/rc.d/lighttpd restart
上面的例子表示在每天18 : 00至23 : 00之间每隔30分钟重启lighttpd 。
0 23 * * 6 /usr/local/etc/rc.d/lighttpd restart
上面的例子表示每星期六的11 : 00 pm重启lighttpd 。
* */1 * * * /usr/local/etc/rc.d/lighttpd restart
每一小时重启lighttpd
* 23-7/1 * * * /usr/local/etc/rc.d/lighttpd restart
晚上11点到早上7点之间，每隔一小时重启lighttpd
0 11 4 * mon-wed /usr/local/etc/rc.d/lighttpd restart
每月的4号与每周一到周三的11点重启lighttpd
0 4 1 jan * /usr/local/etc/rc.d/lighttpd restart
一月一号的4点重启lighttpd
呵呵，为什么不把常用的,但记不住的东西打印出来,放在手边呢?其实也不是年龄大了，很多人都无法记住这些东西.
[Comment ID #13083 Will Be Quoted Here]
嗯，言之有理，我之前就是整理了一些BSD系统各种应急处理方法，打印了放在笔记本包包里面，还真是用到了好几次。
可是为什么要重启apache呢？ 哈
我习惯用的时候再来找，但是前提是知道有这么个东西
[Comment ID #13177 Will Be Quoted Here]
哈哈，这个只是个例子而已了：）实际并不重启，我经常一个月也不用重启一次，现在服务器用的webServer是Nginx，不是Apache，你可以telnet后GET看看header，嘿嘿
经常来你的blog看看.你是个挺有意思的人.如果能整理一套应急的方案,都可以奉献出来，给大家一块享用了。不过如果自己没有接触过,这些方案也就白白放在那里了.
good，最近我也在用，每天定时统计排行榜
这个是重启apache的？
30 21 * * * /usr/local/etc/rc.d/lighttpd restart
这不是重启lighttpd的吗？
apache的我记得这样吧
/sbin/service httpd restart
[Comment ID #18643 Will Be Quoted Here]
哈哈，这个只是个书写的范例罢了，文章的主要目的不是为了记录这个，而是crontab的格式 🙂
0,1 * * * * /usr/L0uiS/Bishop/guard/AutoStartKFXGuard
我这样写是每1分钟都执行一下这个（AutoStartKFXGuard）脚本吗？？请回答!!!
thx
[Comment ID #18849 Will Be Quoted Here]
每小时的整点和每小时的第一分钟执行一次，不是每分钟，如果每分钟可以写成 * * * * * cmd 或者 */1 * * * * cmd 不过第二种方式在solaris下不生效，仅Linux下有效。
* * * * * cmd /usr/L0uiS/Bishop/guard/AutoStartKFXGuard
是这样写吗？？
cmd是执行的意思？？？
对，cmd就是你要执行的命令
我能电话联系您吗？？
我非常着急！
# run-parts
01 * * * * root run-parts /etc/cron.hourly
02 4 * * * root run-parts /etc/cron.daily
22 4 * * 0 root run-parts /etc/cron.weekly
42 4 1 * * root run-parts /etc/cron.monthly
#AutoStartKFXGuard
* * * * * /usr/L0uiS/bishop/AutoStartKFXGuard
~
这里面应该怎么写？？？？？？？？？谢谢你
你在吗？？？？
我想开机掉用AutoStartKFXGuard这个脚本
该如何写呢？？？？？？
老问题，还是没有成功！
谢谢你的耐心回答。。。
你在吗？？？？
我想每分钟掉用AutoStartKFXGuard这个脚本
该如何写呢？？？？？？
老问题，还是没有成功！
谢谢你的耐心回答。。。
不是开机，是每分钟。不好意思
执行下列命令：
# crontab -e
加入这样一行
* * * * * /usr/L0uiS/bishop/AutoStartKFXGuard
保存退出 (:wq)
完成
不错，多谢。
zhxaixpp@126.com
正在找cron的资料，谢谢
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