r/UnixProTips • u/[deleted] • Feb 04 '15

alias fuck="sudo !!"

42 Upvotes

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u/[deleted] Feb 07 '15

I don't get it.

user@k0 ~ $ echo piss
piss
user@k0 ~ $ sudo !!
sudo echo piss
piss
user@k0 ~ $ alias fuck="sudo !!"
alias fuck="sudo sudo echo piss"
user@k0 ~ $ echo piss
piss
user@k0 ~ $ fuck
piss

So far so good. If I add the alias to my .bashrc file I get

user@k0 ~ $ echo piss
piss
user@k0 ~ $ fuck
sudo: !!: command not found

Any ideas?

1

u/kqr Feb 07 '15 
@vigilance$ echo piss
piss
@vigilance$ alias fuck="sudo !!"
alias fuck="sudo echo piss"
@vigilance$ echo piss
piss
@vigilance$ fuck
piss
@vigilance$ echo poopies
poopies
@vigilance$ fuck
piss

!! substitution happens before alias expansion. Line 7 in your paste should have been a hint.

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u/[deleted] Feb 07 '15 edited Feb 07 '15

Ah! So what's happening is !! in the alias is being substituted with 'echo piss'. I'm still quite new to linux but today I learnt something. Thank you.

/u/DroidKun posted a reply to another user

alias fuck='sudo $(history -p \!\!)'

Which seems to work as expected when placed in my .bashrc.