Unix has a number of associated print functions which you may find useful. For a more comprehensive list and explanation of these functions the appropriate man page should be consulted. lpq and lprm are both Unix BSD commands, their equivalent in Unix System V are lpstat and cancel respectively. The commands to apply depend on the system in use:
lpq Typing this command at the prompt will initiate an
examination of the
spooling areas used by lpd for printing files on the printer,
and report on
the status of jobs in the queue.
The print queue can be examined in its entirity, or
by individual users
or by printer (-P option) or jobs - see man pages for more
details.
lprm This command can be used to remove a job or jobs from the
printer's
spool queue. As the spooling directory is protected from
users, using
lprm is normally the only method of removing a job.
You can remove jobs currently active, by job number or
all jobs owned
by a specific user or you can specify a given printer queue
with the -P option
- see man pages for more details.