Change timezone on Linux using /etc/localtime file

Assume we have timezone UTC:

[root@oradbfw-hq01-mgmt ~]# date
Mon Sep 11 09:29:27 UTC 2017

On many distributions , like OEL, CentOS.. . the timezone is conntrolled by localtime file located in /etc directory.

# cd /etc

Localtime is a symbolic link , so we can remove it

# rm localtime

All timezones are located under /usr/share/zoneinfo.
I live and my servers are located in Tbilisi, Georgia. So searching my timezone file:

[root@oradbfw-hq01-mgmt etc]# ll /usr/share/zoneinfo/Asia/Tbilisi
-rw-r–r–. 1 root root 1024 Mar 24 09:21 /usr/share/zoneinfo/Asia/Tbilisi

My country is not in Asia, but in Europe 🙂 this condition changed recently so Linux has not updated and still thinks we in Asia. (Don’t tell this to my goverment 🙂 )

Let’s create correct symbolic link:

# cd /etc
# ln -s /usr/share/zoneinfo/Asia/Tbilisi localtime

Let’s check that it was changed:

[root@oradbfw-hq01-mgmt etc]# date
Mon Sep 11 13:47:04 +04 2017

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