XK0-006 System Management Practice Question
A user reports that a specific process is consuming too much CPU. The administrator needs to change the priority of the process to a lower value (nicer). Which command sequence is appropriate?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
renice +10 -p <PID>
renice changes the priority of an already running process by PID.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
nice -n -10 <PID>
Why it's wrong here
nice -n -10 raises priority, since negative niceness values grant more CPU, the opposite of the requested lower priority. It is tempting because nice is the correct tool; only the sign is wrong, and positive values such as nice -n 10 would lower priority.
- ✗
kill -15 <PID>
Why it's wrong here
kill -15 sends SIGTERM, terminating the process rather than altering its scheduling priority. It is tempting as the standard graceful-shutdown signal, and would be correct when the administrator needs to stop a process cleanly rather than renice it.
- ✗
chrt --idle <PID>
Why it's wrong here
chrt --idle assigns the SCHED_IDLE scheduling policy, which is a distinct scheduling class rather than a niceness adjustment. It is tempting when a process should only run when the CPU is otherwise idle, but the question asks to lower priority via nice.
- ✓
renice +10 -p <PID>
Why this is correct
renice adjusts the nice value of an already-running process, and +10 raises it, lowering scheduling priority so the process yields CPU to others. The -p flag targets the given PID, satisfying the requirement to make the busy process nicer.
Go deeper
Related to this question
Learn chapter
Process Management and System Monitoring
Key term
Value
Value is the perceived worth, benefit, or usefulness that a service, product, or activity delivers to stakeholders, especially customers and the business.
Key term
Process
In IT service management, a process is a structured set of activities designed to accomplish a specific objective, such as managing incidents or changes, by transforming inputs into defined outputs.
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