Linux history (Histroy) command logging filtering

The filtered directory is reached by setting an environment variable about the history command, and a timestamp can also be added.

The following methods can be added to the environment variable file to achieve permanent effect.

2. To add a timestamp to a history command:

   1. Export histtimeformat= '%F%T '
      

4. Search history using Ctrl+r.

6. Number of historical command records

   1. Export histsize=450

   2. Export histfilesize=450

8. Change the file of the Record History command,

   1. Export Histfile=/home/histroy_filename

10. Remove consecutive duplicate commands from a file

    1. Export Histcontrol=ignoredups
       

12. Remove all duplicate entries from the file

    1. Export Histcontrol=erasedups
       

14. Set the command filter to not remember the command being filtered. When the terminal enters the command, enter a space in front of the command that you do not want to remember, in combination with alias.
    

    1. Export Histcontrol=ignorespace

8. Ignore remembering specific commands

1. Export histignore= "Pwd:ls:ls-l:"
   

Linux history (Histroy) command logging filtering