Source
straemer•

What is 'an'?

6
hidden_knife_man•
$ man an
No manual entry for an

It looks like an anagram generator: http://packages.ubuntu.com/trusty/an

16
Web_Rand•

So you got something like this?

an foo
an foo: command not found

That terrible, mean command line.

6
TMasterOP•

I wish. I was very confused for a second until I could work out what actually happened. Example:

TMaster@localhost:~$ an grep
rep g
rep G
per g
per G
peg r
peg R
erg p
erg P
Rep g
Rep G
Peg r
Peg R
Ger p
Ger P
re p g
re p G
re g P
re P G
Re p g
Re p G
Re g P
Re P G
Ge r p
Ge r P
Ge p R
Ge R P
GE r p
GE r P
GE p R
GE R P
Er p g
Er p G
Er g P
Er P G
r p g e
r p g E
r p e G
r p G E
r g e P
r g P E
r e P G
r P G E
p g e R
p g R E
p e R G
p R G E
g e R P
g R P E
e R P G
R P G E
16
antonivs•

It saved you from reading the man page for grep. I'd say that's a win.

18
TMasterOP•

The real command was something else, but I figured I'd demonstrate with a shorter command, to cause others less of a scrolling headache. Four letters seemed optimal to me.

3