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标题: crontab内容 [打印本页]

作者: 克拉玛依 时间: 2009-11-03 17:05
标题: crontab内容

# /etc/crontab - root's crontab for FreeBSD
#
# $FreeBSD: src/etc/crontab,v 1.32 2002/11/22 16:13:39 tom Exp $
#
SHELL=/bin/sh
PATH=/etc:/bin:/sbin:/usr/bin:/usr/sbin
HOME=/var/log
#
#minute hour mday month wday who    command
#
*/5    *    *    *    *    root /usr/libexec/atrun
#
# Save some entropy so that /dev/random can re-seed on boot.
*/11 *    *    *    *    operator /usr/libexec/save-entropy
#
# Rotate log files every hour, if necessary.
0    *    *    *    *    root newsyslog
#
# Perform daily/weekly/monthly maintenance.
1    3    *    *    *    root periodic daily
15    4    *    *    6    root periodic weekly
30    5    1    *    *    root periodic monthly
#
# Adjust the time zone if the CMOS clock keeps local time, as opposed to
# UTC time.  See adjkerntz(

for details.
1,31 0-5 * * * root adjkerntz -a

这样的crontab文件里没注释的行都可以注释掉么？有什么影响么？

作者: lsstarboy 时间: 2009-11-03 22:14
无非就是一个常规的检查、时间同步之类的东西，如果服务器要求不严格，当然可以注释掉。但是最好还是弄明白这些程序都是干嘛用的，省的到了出问题的时候找不到原因。

作者: ppabc 时间: 2009-11-06 09:48
最好要做到知其然知其所以然！

作者: leetaedong 时间: 2009-11-09 13:30
同意.

作者: UnixStudier 时间: 2009-11-10 10:41
我曾经用过的crontab:
# /etc/crontab - root's crontab for FreeBSD
#
# $FreeBSD: src/etc/crontab,v 1.32.34.1 2009/04/15 03:14:26 kensmith Exp $
#
SHELL=/bin/sh
PATH=/etc:/bin:/sbin:/usr/bin:/usr/sbin
HOME=/var/log
#
#minute hour mday month wday who    command
#
*/5    *    *    *    *    root /usr/libexec/atrun

#cron build all servers,and mail to developers
0    23    *    *    *    MyUserName /home/MyUserName/cronbuild

#
# Save some entropy so that /dev/random can re-seed on boot.
*/11 *    *    *    *    operator /usr/libexec/save-entropy
#
# Rotate log files every hour, if necessary.
0    *    *    *    *    root newsyslog
#
# Perform daily/weekly/monthly maintenance.
1    3    *    *    *    root periodic daily
15    4    *    *    6    root periodic weekly
30    5    1    *    *    root periodic monthly
#
# Adjust the time zone if the CMOS clock keeps local time, as opposed to
# UTC time.  See adjkerntz ( 8 )  for details.
1,31 0-5    *    *    *    root adjkerntz -a

红色的一行是我添加的，意思是：每天晚上23点以MyUserName用户运行这个可执行文件：/home/MyUserName/cronbuild
cronbuild会编译我自己的程序，然后把编译结果当邮件发送到我自己的邮箱里面。

[ 本帖最后由 UnixStudier 于 2009-11-10 10:43 编辑 ]

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