As root, type the complete command that sets the nice value of every process belonging to the user bob to 15. Identify the target by user name, not by PID.
LPIC-1 Exam 101-500, objective 103. GNU and Unix commands medium
Machine-checked — no person has signed for it. This question was read against the source cited below by an automated pass, which found no contradiction. That is a weaker claim than it sounds: the same kind of process wrote the question, so it can confirm its own mistake.
Treat it as a good draft rather than as settled fact, and read the source below before you rely on it. It is not used in mock exams here — only questions a person has signed for are.
How these questions are written — where each question comes from, what the verification ledger records, and what happens when one is found wrong.
Answer
Type the answer.
Accepted answers
renice -n 15 -u bobrenice 15 -u bobrenice -n 15 --user bobrenice 15 --user bobrenice --priority 15 -u bobrenice --priority 15 --user bob
Case sensitive — Linux is, and grading LS as ls would teach a falsehood.
Why
renice selects its targets in three ways: -p for process IDs (the default when a bare number follows the priority), -g for a process group, and -u for every process owned by a user or UID. The priority is absolute, so this command lands each of bob's processes on 15 no matter what they had before. Raising a nice value is permitted to the owner as well, but lowering one, or acting on somebody else's processes, requires root.
Where this comes from
- Cited
- manual page renice(1)
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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