The .bash_history file has no date or time information in it. Sometimes it would be very nice to know when some command got executed.
What i did is add the following 2 lines in /etc/profile:
HISTTIMEFORMAT='%F %T ' export HISTTIMEFORMAT
Now logout, and log back in. Execute a command and check ‘history’:
1 2011-11-04 16:22:31 su
2 2011-11-04 16:22:33 ps fax
3 2011-11-04 16:22:35 history