How to set timezone in Red Hat or CentOS
To set the timezone in RedHat or CentOS, first unlink the current timezone:
sudo unlink /etc/localtime
Find out which timezone you want to use by running ls in the zoneinfo directory:
ls /usr/share/zoneinfo
Then run another ls in the subdirectory you want, in my case, Europe:
ls /usr/share/zoneinfo/Europe
Select the capital of your city, and link it to /etc/localtime:
sudo ln -s /usr/share/zoneinfo/Europe/Stockholm /etc/localtime
Now the command date
should show your new timezone.