How do I display shell command history with date and time under UNIX or Linux operating systems?

If the HISTTIMEFORMAT is set, the time stamp information associated with each history entry is written to the history file, marked with the history comment character. Defining the environment variable as follows

root@linuxforfreshers.com:~$ vim .bash_profile

$ HISTTIMEFORMAT="%d/%m/%y %T "

:wq

Or

root@linuxforfreshers.com:~$  echo 'export HISTTIMEFORMAT="%d/%m/%y %T "' >> ~/.bash_profile

root@linuxforfreshers.com:~$ source .bash_profile

Where,

%d – Day

%m – Month

%y – Year

%T – Time

root@linuxforfreshers.com:~$  history

Sample outputs:

986  10/03/1104:31:36 memcached-tool  10.10.28.22:11211 stats

  987  10/03/1104:31:36 w

  988  10/03/1104:31:37 iostat

  989  10/03/1104:31:37 top

  990  10/03/1104:31:37 at

  991  10/03/1104:31:38 atop

  992  10/03/1104:31:40 collectl

  993  10/03/1104:31:41 grep CPU /proc/cpuinfo

  994  10/03/1104:31:45 vmstat 3 100

  995  10/03/1104:31:55 sar -W -f /var/log/sa/sa12

References:

For more info type the following commands:

man bash

help history

man 3 strftime