RHCSA Rapid Track

A signal is a software interrupt that reports events to an executing program. The kill, pkill, and killall commands use signals to control processes.

The tuned service will automatically modify device settings to meet specific system needs based on a pre-defined selected tuning profile.

To revert all changes made to the system settings by a selected profile, either switch to another profile or deactivate the tuned service.

A relative priority is assigned to a process to determine its CPU access. This priority is called the nice value of a process.

The nice command assigns a priority to a process when it starts. The renice command modifies the priority of a running process.