As root, type the command that changes the nice value of the already running process with PID 2500 to 10.
LPIC-1 Exam 101-500, objective 103. GNU and Unix commands medium
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Answer
Type the answer.
Accepted answers
renice 10 -p 2500renice -n 10 -p 2500renice 10 2500renice -n 10 2500renice 10 --pid 2500renice -n 10 --pid 2500
Case sensitive — Linux is, and grading LS as ls would teach a falsehood.
Why
renice adjusts a process that already exists; nice only sets the value for a command you are about to start. The priority argument may be given directly or after -n, and the target may be a PID (-p, the default), a user (-u) or a process group (-g). On Linux (util-linux renice) the value is absolute in both forms; POSIX would read -n as a relative increment, so the positional form is the portable one. Raising the value to 10 makes the process less favourable to the scheduler, which any user may do to their own processes; only root may move it back down.
Where this comes from
- Cited
- LPI exam objective 103.6
- What it says
- Change the priority of a running process with renice.
Practise this
Reading one question is not practice. The trainer will draw a short set from objective 103 and space the ones you get wrong.
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