[PLUG] Usage of pidof vs killall5

[Russell Evans]

pidof is a link to killall5 on my box. The man page for pidof says this is how
it's supposed to be.

If I do pidof process; I get a pid number returned, if that process is running.
Doing a `killall5 process` returns an error message; killall5: only one
argument, a signal number, allowed. 

So a link is a link, correct? So why does killall5 act differently than pidof? 

Thank you
Russell