Not so sure what you mean "command line".

You can submit a sas job as a foregroud job:
   sas YourJobName.
But this will hold up you unix session.
You can also submit a sas job as a backgroud job:
   nohup sas YourJobName &.
This will not hold up you session and when you log out, you job continue to run.

I do this all the time in Windows... and has been a LONG time for me since programming UNIX at AT&T... but it should be similar

I have batch files set up to run on a scheduled basis on a 'dog' machine on the network.  The one drawback is that SAS & the scheduled tasks do not run as a service, so the machine needs to be logged in ALL of the time.

In your batch file put
"C:\Program Files\SAS Institute\SAS\V8\sas.exe" -sysin "path and full program name.sas"

SAS's site has a nice blurb on doing it too
ftp://ftp.sas.com/techsup/download/technote/ts648/ts648.html

This is great. We use autosys in UNIX and we wanted a way to call the specific programs from autosys. Thank you so much.