How do I clear a Print-queue in Ubuntu?

Question

I am an absolute beginner with Ubuntu and I appear to have a long queue of documents in my H.P. 840C printer.

Answer 1

The question was how to kill all jobs. The simple way to kill all jobs:

lprm -

The complicated linux old-school way is below:

Command line:

lpstat -o

to view outstanding print jobs.

cancel -a {printer}

to cancel ALL jobs or ...

cancel {printerjobid}

to cancel 1 job.

---

man page cancel

Answer 2

Either

1. Use the printer dialog: type "Printers" in the dash and navigate to the printer
2. Use the CUPS web interface: point your browser at http://localhost:631/jobs/ and proceed from there
3. Use the command line interface: use lpq to see jobs, lprm to remove. Refer to man lprm for more information.

Answer 3

Use

lpstat -W completed -o

to view list of completed jobs.
Use

lpstat -o

to view list of not-completed jobs.

And to delete job list,just use this command:

cancel -a -x

This will cancel all pending jobs, as well as deleting them.

Answer 4

I tried using lpstat and lprm but was unable to figure out basic things like the job number and stuff. Instead, I used the command:

lpq

This produced:

zac@computer:~$ lpq
lpq: Error - no default destination available.

A quick Internet search and then I tried:

zac@computer:~$ lpq -a
Rank    Owner   Job     File(s)                     Total Size
1st     zac     85      TorahNT.odt                 59392 bytes

FINALLY I find the all important Job number: 85!

NOW I run lprm:

zac@computer:~$ lprm 85
zac@computer:~$

And to confirm I did this:

zac@computer:~$ lpq -a
no entries
zac@computer:~$ 

Finally, the printer queue is empty.

Answer 5

Well, answers given here didn't work for me so here's what I did -

ps aux | grep printer
kill {printer job}