Cannot delete print job on Ubuntu 18.04

Question

If I print something and the printer is not available, the print job is queued and the queue can be shown, using the global configuration menue (Devices -> Printers). There for each printer device the number of pending jobs is shown as button. Selecting this button opens a dialog window with a list of pending jobs. Every job in one line is combined with buttons. One of this buttons is a cancel button. But selecting this cancel-button does not do anything.

How can I delete pending print jobs?
Is there any workaround with a shell command?

printing

How can I delete pending print jobs?
Is there any workaround with a shell command?

abu_bua · Answer

You can use the lprm command:
Use
man lprm

to get a description.
To delete all queued jobs:
lprm -

NAME
lprm - cancel print jobs
SYNOPSIS
   lprm [ -E ] [ -U username ] [ -h server[:port] ] [ -P destination[/instance] ]
   [ - ] [ job-id(s) ]

DESCRIPTION

lprm cancels print jobs that have been queued for printing.  If  no  arguments
are supplied, the current job on the default destination is canceled.  You can
specify one or more job ID numbers to cancel those jobs or use the - option to
cancel all jobs.

OPTIONS
   The lprm command supports the following options:

-E   Forces encryption when connecting to the server.

-P destination[/instance]
        Specifies the destination printer or class.

-U username
        Specifies an alternate username.

-h server[:port]
        Specifies an alternate server.

The  CUPS  version of lprm is compatible with the standard Berkeley command of the same name.

EXAMPLES

Cancel the current job on the default printer:
  lprm

Cancel job 1234:
  lprm 1234

Cancel all jobs:
  lprm -

Cannot delete print job on Ubuntu 18.04

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