Per the documentation, the correct way to start the slon process is:

slon [option...] [clustername] [conninfo]

Throughout the documentation, there are several references to stopping 
the slon process,
but no mention of a specific command to do it. Currently, I use
ps -ef | grep slon
and then kill -9 the process(s).

Is there a better way to stop slon?

I am aware of the PERL tool "slon_kill", but if I am using PERL, what
do I do?

Why is there no stop option for the slon command?
Am I missing something?