execute your commands and avoid history records

cat | bash
Sometimes you don't want to leave history, because of passwords use or somethink like. I think it help.

7
2010-08-18 13:47:46
cat

4 Alternatives + Submit Alt

What Others Think

Interesting, but a space before a command is a better way of running something and not saving it in the history. Keep in mind though that passwords on the command line may still show up in a process list and if you're on another sysadmin's system, they might have turned on exec logging to keep track of what users are running.
deltaray · 482 weeks and 5 days ago
Putting a password in to a variable in the environment of a shell is an *incredibly* bad idea. First, the value will stay in memory until it is changed. Secondly, shell expansion will have it one the command line -- leaving it in another shell environment variable, and third (as pointed out above) it can end up in the process list on the system. And, even if the memory is freed up by the shell, and the variable is reset, the value of the password is still in memory...you have no way of controlling when the memory page will be reused and therefore no way to avoid someone dumping pages of memory from the system looking for items that could be passwords.
unixmonkey11428 · 482 weeks and 4 days ago
This hack is truth. The space command thing is crap. Another way to not right your entire session history (If auto-append to history is not on) is to run kill -9 $$. The $$ is your user session pid.
somaddict · 365 weeks and 3 days 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: