Hack 59. Force history not to remember a particular command using HISTCONTROL

by Ramesh

When you execute a command, you can instruct history to ignore the command by setting HISTCONTROL to ignorespace AND typing a space in front of the command as shown below. I can see lot of junior sysadmins getting excited about this, as they can hide a command from the history.

It is good to understand how ignorespace works. But, as a best practice, don’t hide purposefully anything from history.

# export HISTCONTROL=ignorespace

# ls –ltr

# pwd

#  service httpd stop 

[Note:  There is a space at the beginning of service, to ignore this command from history]

# history | tail -3
       67  ls –ltr
       68  pwd
       69  history | tail -3

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