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One of my worst was `source ~/.bash_history` via accidental tab completion. I was expecting .bash_profile. The nasty part was, I couldn't kill it because of all the mess (system instability) it was creating. A couple of 'cd ..' calls and a 'rm -rf *' ended up biking some root directories.

I ended up restoring from backup.

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You have just added a new reason to my list of reasons never to put `rm -rf *` into my command-line history again.

Could you add 'rm -rf' to histignore? I remember it works with patterns but can't remember if you can use it for specific commands. I'm not on my linux box now so I can't test it.

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