kill -9 $$

exit without saving history

this exits bash without saving the history. unlike explicitly disabling the history in some way, this works anywhere, and it works if you decide *after* issuing the command you don't want logged, that you don't want it logged ... $$ ( or ${$} ) is the pid of the current bash instance this also works perfectly in shells that don't have $$ if you do something like kill -9 `readlink /proc/self`

29
By: stu
2009-03-27 23:13:53

These Might Interest You

What Others Think

Doesn't `readlink /proc/self` return the pid of the readlink program rather than the shell's pid?
bwoodacre · 477 weeks and 3 days ago
heh, yeah, it does. So, time for me to stop assuming everything is a shell builtin :-)
stu · 474 weeks and 3 days ago
I like this better, since a kitten dies every time you kill -9. unset HISTFILE
syssyphus · 469 weeks and 6 days ago
This is not a good way to do things because you are ignoring anything else that might be done in .bash_logout. A cleaner way to clear your running history is like this: OLDHISTSIZE=$HISTSIZE HISTSIZE=0 HISTSIZE=$OLDHISTSIZE Also, don't count on being immune from logging by the system as some servers might be running exec loggers, which are independent of the shell.
deltaray · 439 weeks and 1 day ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

You must be signed in to comment.

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands



Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: