It's been a long time since I used DOS, but I don't remember any 'printer' command. I suspect it's a SCO thing.
Your question is confusing. You seem to be alternating between *nix and DOS. Which one are you trying the command on? If it's DOS, this isn't the forum
Why don't you try 'man printer' or 'help printer' or 'printer /help' and see what comes up on the box where you can use that prog. Assuming that noone else is familiar with the command, the help output may enable us (or you) to find a suitable replacement.
EDIT: Whoops, I guess this *is* an acceptable forum for dosemu. Sorry!