To check on the progress of your print job or survey the print queues, use lpq.
For example, to show the jobs pending in queue ps4:
% lpq -P ps4 Queue Rank Owner Job Size Time File(s) ps4c 1 bplecs@brillig 944 13469 12:42:05 /tmp/lj8100.ps
To check all printer queues, use lpq -a.
See the man page for lpq for more details.