Which Linux command is used to modify the priority of a running process?

Correct option is D

The renice command is used in Linux to modify the priority of a running process. It allows users to increase or decrease the "niceness" value of a process, which determines how much CPU time it gets. Lower values mean higher priority.
Example: renice -n 5 -p 1234 # Set niceness to 5 for process with PID 1234
Important Key Points:
1. renice allows real-time modification of process priorities without terminating or restarting the process.
2. The niceness value ranges from -20 (highest priority) to 19 (lowest priority).
3. Processes with a lower niceness value get higher CPU time compared to those with higher niceness values.
Knowledge Booster:
· ps: Displays information about processes but does not modify them.
· kill: Sends signals to terminate or restart processes, not for modifying priorities.
· nice: Sets the niceness value when starting a process, unlike renice, which works on running processes.
· top: Provides a real-time view of system processes but does not modify priorities directly.