If you want to change Linux system timezone such as CST, KST and so on, follow following steps. But, you should know the string of timezone you want to change. You can search at this site – http://www.timezoneconverter.com/cgi-bin/zoneinfo
# Confirm current setting information of the system about timezone
$ date
$ cat /etc/timezone
# I gonna to change it’s timezone to CET and synchronize
$ echo “Europe/Luxembourg” | tee /etc/timezone
$ cat /etc/timezone
$ dpkg-reconfiure —frontend noninteractive tzdata
# Check if the value is changed
$ date