自動修改Linux 系統時間

[root@localhost ~]# crontab -l

0 0 * * * /opt/ch_date.py

[root@localhost ~]# cd /opt/

[root@localhost opt]# ls

ch_date.py syslog-ng

[root@localhost opt]# more ch_date.py

#!/usr/bin/env python

# change date to 4.23-5.22

import os

now = int(os.popen("date +%Y%m%d").read())

if now > 20130521:

   os.system("date -s 20130423")

[root@localhost opt]# date

Sun May 5 09:03:44 PDT 2013

[root@localhost opt]# ll

total 12

-rwxr--r-- 1 root root 157 Apr 23 13:25 ch_date.py

drwxr-xr-x 9 root root 4096 Mar 14 01:14 syslog-ng