Hw to clear the selected lines from History?

linuxxx123 · 12-06-2007, 12:39 PM

From the help of this forem I have got hw to clear the history..using history -c .. But how to clear the particular lines from the history, insted of deleting whole history lines.. I am expecting the positive replies from seniors...

Mega Man X · 12-06-2007, 12:57 PM

Hi linuxxx123!

I hope you are talking about bash. I really don't know what you mean by "hw". It that is the case, this might help you:

http://www.ss64.com/bash/history.html

You can also delete lines manually, I suppose, by editing you ~/.bash_history. It is a simple text file that you can edit with any text-editor. I never did it though...

marozsas · 12-06-2007, 01:54 PM

There is a small trick I learned just a few weeks ago that can help you: any commands preceded by one or more spaces are not recorded in history as in " ls /etc".

And you set a list of commands in shell variable HISTIGNORE. The commands in this list are not recorded in the history. For example, mine looks like:

Code:

HISTIGNORE=encfs:amule:fusermount:mplayer

linuxxx123 · 12-10-2007, 02:59 PM

Thank you for all valuable replies... History -d command is exactly fulfill my requirement.. But I can’t able to use this command for delete more than one line. Please explain me how to use this command for delete the more number of selected lines. For example delete the line 25 to 56 from bash.

Once again thank you for your valuable replies.

chrism01 · 12-11-2007, 01:05 AM

Just add a loop around the cmd, specifying which line nums to delete.

b0uncer · 12-11-2007, 02:50 AM

How about just more or less manually altering the history file (like .bash_history), maybe with sed or something?

deepsix · 01-08-2009, 03:56 PM

"rm .bash_history" ...next time you login and issue a command bash will create a new history file with a clean slate.