Clear Print Queue System

When you have a printer queue stock or a job that cannot be canceled or the printer is not responding etc etc there are some methods to force the printer, queue, job to continue working 

First let check the current status of the printer 

# lpstat

If the job stock cannot be removed with the following command then try

enq -x job -P printer

to manipulate the daemon (qdaemon) use the following

startsrc -s qdaemon

stopsrc -s qdaemon

I think the commands speak by their own ;-)

Stop associated processes: 

ps -ef | grep qd

kill -9 PIDNumbers

ps -ef | grep pio

kill -9 PIDNumbers

with the qdaemon don client those paths that store the queues, jobs etc etc with the following

rm  /var/spool/lpd/qdir/*

rm  /var/spool/lpd/stat/*

rm  /var/spool/qdaemon/*

Once everything has been cleared restart the qdaemon