runlevel — Print previous and current SysV runlevel
runlevel [options...]
runlevel prints the previous and current SysV runlevel if they are known.
The two runlevel characters are seperated by a single space character. If a runlevel cannot be determined, N is printed instead. If neither can be determined, the word "unknown" is printed.
Unless overridden in the environment, this will check the utmp database for recent runlevel changes.
If one or both runlevels could be determined, 0 is returned, a non-zero failure code otherwise.
$RUNLEVELIf
$RUNLEVEL is set,
runlevel will print
this value as current runlevel and
ignore utmp.
$PREVLEVELIf
$PREVLEVEL is set
runlevel will print
this value as previous runlevel and
ignore utmp.