This article is some TIL about setting up timezone in Debian server
Change timezone in Linux
In DEBIAN, to change timezone, we using file /etc/localtime For example, in my case, I am living at Ho Chi Minh city, so I want to change timezone to Asia/Ho_Chi_Minh
# first you should backup your /etc/localtime :-P
$> sudo cp /etc/localtime /etc/localtime.old
# create a soft link of timezone you want to use to /etc/localtime
$> sudo ln -sf /usr/share/zoneinfo/Asia/Ho_Chi_Minh /etc/localtime
# check the result
$> date
Mon Jun 25 20:26:02 ICT 2012
# Cool, timezone now is ICT (indochina timezone)Change date of Linux system
We using date command to change Linux datetime
# print current date time
$> date
Mon Jun 25 20:26:02 ICT 2012
# change datetime to another time using date --s=FORMAT
# with FORMAT = YYYYMMDD hh:mm:ss
# YYYY: 4-character years
# MM: 2-character months
# DD: 2-character days
# hh: hours
# mm: minutes
# ss: seconds
$> date --s="20120630 20:26:02"
# check the result
$> date
Sat Jun 30 20:26:02 ICT 2012