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May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!

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Do I have this command?

Terminal - Do I have this command?
which <command> > /dev/null 2>&1 && echo Success!
2013-03-13 10:04:42
User: skkzsh
Functions: echo which
Do I have this command?


which <command> > /dev/null 2>&1 || echo Error!

For example, I write

which colordiff > /dev/null 2>&1 && alias diff=colordiff

in my `~/.bashrc`.


There are 5 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

Perhaps more useful, is to use "type ".

For example:

which ls


type ls

ls is aliased to `ls -F --color=auto'

Comment by mpb 141 weeks and 2 days ago

Thank you, but outputs of `which` and `type` on my environments are different from yours.

For example:

which ls

ls: aliased to ls -Fh

type ls

ls is an alias for ls -Fh

on Debian GNU/Linux 6.0 & Mac OS X 10.7.5.

I always use `which` since its output is simple.

Comment by skkzsh 141 weeks and 2 days ago


(( $+commands[colordiff] )) && echo "success"

BTW, if you want both 'which' and 'type' you can provide which with the '--read-alias' switch, that is if your not using the builtin:

% which which

which='alias |/usr/bin/which --tty-only --read-alias --show-dot --show-tilde'


Comment by khayyam 140 weeks and 1 day ago

Your point of view

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