A printer must be taken out of service for maintenance. You want the queue to refuse any new submissions, so users are told immediately rather than having work pile up. Which command does that?
LPIC-1 Exam 102-500, objective 108. Essential system services hard
Draft — not checked yet. This question was written from the published exam objectives and cites the clause it comes from, but nobody has yet read it against that clause and signed for it.
It is kept out of search results and out of mock exams until they have. Read the source below before you take the answer as settled.
The options
Not correct cupsdisable laserjet
Wrong for this goal. cupsdisable stops the queue from sending jobs to the printer, but the queue keeps accepting new submissions, which then accumulate — exactly what you wanted to avoid.
Correct cupsreject laserjet
Correct. cupsreject makes the destination refuse new jobs, so submissions fail at once with a message. cupsaccept turns acceptance back on.
Not correct lprm -P laserjet -
Wrong. This removes the jobs currently in that queue. It does not stop new ones from arriving.
Not correct lpstat -d laserjet
Wrong. lpstat only reports status; -d shows the system default destination and changes nothing.
Why
CUPS controls two independent switches per destination. Accepting or rejecting new jobs is set with cupsaccept and cupsreject (the older names are accept and reject). Whether queued jobs are actually printed is set with cupsenable and cupsdisable. Taking a printer down cleanly usually means cupsreject first so nobody adds work, then letting the queue drain or cupsdisable to hold it. lpstat -p reports both states for each printer.
Where this comes from
- Cited
- LPI exam objective 108.4
- What it says
- Control whether a CUPS destination accepts jobs and whether it prints them.
Practise this
Reading one question is not practice. The trainer will draw a set from objective 108 and space the ones you get wrong.