Amazon EC2 Instance TIMEZONE

[
ec2-user@ip-10-0-0-121 ~]$ date
Fri Nov 10 02:31:04 UTC 2017
[ec2-user@ip-10-0-0-121 ~]$ cat /etc/localtime  
TZif2UTCTZif2UTC
UTC0
[ec2-user@ip-10-0-0-121 ~]$ sudo rm -f /etc/localtime
[ec2-user@ip-10-0-0-121 ~]$ sudo ln -s /usr/share/zoneinfo/Asia/Seoul /etc/localtime
[ec2-user@ip-10-0-0-121 ~]$ date
Fri Nov 10 11:31:18 KST 2017
[ec2-user@ip-10-0-0-121 ~]$