Add timestamp to history command

[kuldeep]

history is a linux shell command which list all executed command on server. By default history command can display 1000 commands.

This command is use for invistigation purpose as which command was executed to solve issue or if any wrong command was executed to malfunctioning of server.

By default output of command is simple like:

 989  date
 990  history
 991  history
 992  w
 993  top
 994  w
 995  cd /tmp
 996  ls -la

Now adding timestamp will show you a detail output with date time and command.
To ad time stamp SSH to server as root and edit file /root/.bash_profile with your favorite editor and add following line.

export HISTTIMEFORMAT="%F %T "

now logout of shell prompt and login again and execute history command, you will see detail output.

root@Server[~]#history

   19  04/25/10 08:26:48 hostname
   20  04/25/10 08:46:34 history
   21  04/25/10 08:46:48 w
   22  04/25/10 08:46:50 date
   23  04/25/10 08:46:52 cal
   24  04/25/10 08:46:53 ls -la
   25  04/25/10 08:46:55 top
   26  04/25/10 08:47:11 tail -f /var/log/messages
   27  04/25/10 08:47:29 history

Note: Edit file /root/.bash_profile carefully, do not mess it up.

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