$ who -r
 .       run-level 3  Sep  1 14:45     3      0  S
$

run level 3

Identifies the current run level. 

Sep 1 14:45

Identifies the date of last run level change. 

3

Is the current run level. 

0

Identifies the number of times at this run level since the last reboot. 

S

Identifies the previous run level.