使用一个虚拟机服务，其时区设置的为格林兰标准时区，我北京时区在东八区，较其快八个小时。
修改时区需要执行
tzselect
一步步选择下来，注意确认后的information
Therefore TZ='Asia/Shanghai' will be used.
Local time is now: Fri Aug 2 09:28:07 CST 2013.
Universal Time is now: Fri Aug 2 01:28:07 UTC 2013.
Is the above information OK?
1) Yes
2) No
#? 1 You can make this change permanent for yourself by appending the line
TZ='Asia/Shanghai'; export TZ
to the file '.profile' in your home directory; then log out and log in again.
需要自己将TZ='Asia/Shanghai'; export TZ 写入到.profile中，再重新登录即可。