Set Date and Time for Each Command You Execute in Bash History
To set HISTTIMEFORMAT variable temporarily, export it as below on the command line:
$ export HISTTIMEFORMAT='%F %T'
In the export command above, the time stamp format:
However, if you want to configure this variable permanently, open the file ~/.bashrc with your favorite editor:
$ vi ~/.bashrc
And add the line below in it (you mark it with a comment as your own configuration):
#my config export HISTTIMEFORMAT='%F %T'
Save the file and exit, afterwards, run the command below to effect the changes made to the file:
$ source ~/.bashrc