Modify the Linux system time EDT to Cst__linux

I saw a machine this morning. Time does not match, this thought the system time and the network Beijing time is not synchronized, on the terminal command performs the network time synchronization

[Root@localhost ~]# ntpdate time.windows.com

After execution, in the execution of terminal commands, viewing time or the same, in fact, EDT and CST are different, time zone is not the same

EDT: Refers to the eastern United States Daylight Time, Boston, New York, Washington Columbia, Dist. Of, all in this timezone, with the 12-hour jet lag, 12 hours late.

CST: can refer to the following two kinds:

1. Central United States Standard Time (West Six district, -6:00), China is East Eight (+8:00), Beijing time than the Central American Standard Time 14 hours earlier. 3:45 PM CST is Beijing time 1:45.
2. Chinese standard Time (+10:30), China is East Eight (+8:00), Beijing time is 2.5 hours later than the standard time in Australia. 3:45 pm CST is Beijing time afternoon 5:45.

Now, just change to the time zone CST in Beijing, and modify it as follows:

[Root@localhost ~]# mv/etc/localtime/etc/localtime.bak
[root@localhost ~]# ln-s Shanghai  /etc/localtime
[root@localhost ~]# Date