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How to Check the Time of the Executed Command


We always check our History and Mostly for the work we have done. why do we save command history ? or what is the need to know when was it executed? the all questions are simple to answer. once you have install or edit something and now you need to again know how you did it then you just have to remember the time you did it and just See the command history you will get what you need.

To Check the time of the executed command, the environment variable for bash needs to be set as HISTTIMEFORMAT. After setting the variable you need to just execute the following command :

export HISTTIMEFORMAT="%F %T "

Now, Check the history by executing the command below.

history

This Command will show you the History in the following format (Just and Example) :

  131  2011-02-25 19:28:22 /opt/lampp/lampp start
  132  2011-02-25 19:28:22 sudo su
  133  2011-02-25 19:28:22 sudo /etc/init.d/nscd restart
  134  2011-02-25 19:28:22 sudo aptitude install nscd
  135  2011-02-25 19:28:22 sudo apt-get install nscd
  136  2011-02-25 19:28:22 sudo /etc/init.d/nscd restart
  137  2011-02-25 19:28:22 sudo su
  138  2011-02-25 19:28:22 service nscd remove
  139  2011-02-25 19:28:22 service nscd status
  140  2011-02-25 19:28:22 service nscd force-reload
  141  2011-02-25 19:28:22 sudo service nscd force-reload
  142  2011-02-25 19:28:22 service nscd status
  143  2011-02-25 19:28:22 sudo service nscd start
  144  2011-02-25 19:28:22 sudo su
  145  2011-02-25 19:28:22 ping www.zerotech.in
  146  2011-02-25 19:28:22 setip
  147  2011-02-25 19:28:22 getip
  148  2011-02-25 19:28:22 sudo su
  149  2011-02-25 19:28:25 history
  150  2011-02-25 19:28:53 export HISTTIMEFORMAT="%F %T "
  151  2011-02-25 19:28:59 history

Hope you like it , I would love to have your feedback