What is the priority range for processes in Linux?

In Linux, the priority range for processes is indeed from -20 to 19. This range includes negative values for high-priority processes and positive values for low-priority processes. Specifically, the value of -20 represents the highest possible priority, while 19 represents the lowest. This priority mechanism allows system administrators and users to control the scheduling of processes; higher priority processes are allocated more CPU time compared to lower priority ones.

This structure is essential for performance tuning and resource management within the system, allowing for efficient allocation of CPU resources based on the needs of different processes. The priority can be adjusted using commands like nice and renice, enabling users to specify how their processes should compete for CPU time.

The other options do not accurately reflect the priority range used in Linux systems, as they either fall short of the actual minimum and maximum values that can be set or do not encompass the full spectrum used by the system.