HPFOCUS

System run control (rc) levels are pre-defined and determines the current state of the system.

HP-UX supports eight rc levels of which six are currently implemented.

Not all of these are commonly used though. The default rc level is 3.

Below table describes various run levels.

To check the current and previous rc levels of the system, use the who command with -r option:

# who -r

The output of this command, as shown in below figure, indicates that the system is currently running at run level 3 and its last run level was S. The output also displays the date and time of the last system run level change.