RUNLEVEL(8)runlevelRUNLEVEL(8)NAMErunlevel - Print previous and current SysV runlevelSYNOPSISrunlevel [options...]
OVERVIEW
"Runlevels" are an obsolete way to start and stop groups of services
used in SysV init. systemd provides a compatibility layer that maps
runlevels to targets, and associated binaries like runlevel.
Nevertheless, only one runlevel can be "active" at a given time, while
systemd can activate multiple targets concurrently, so the mapping to
runlevels is confusing and only approximate. Runlevels should not be
used in new code, and are mostly useful as a shorthand way to refer the
matching systemd targets in kernel boot parameters.
Table 1. Mapping between runlevels and systemd targets
┌─────────┬───────────────────┐
│Runlevel │ Target │
├─────────┼───────────────────┤
│0 │ poweroff.target │
├─────────┼───────────────────┤
│1 │ rescue.target │
├─────────┼───────────────────┤
│2, 3, 4 │ multi-user.target │
├─────────┼───────────────────┤
│5 │ graphical.target │
├─────────┼───────────────────┤
│6 │ reboot.target │
└─────────┴───────────────────┘
DESCRIPTIONrunlevel prints the previous and current SysV runlevel if they are
known.
The two runlevel characters are separated 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.
OPTIONS
The following option is understood:
--help
Print a short help text and exit.
EXIT STATUS
If one or both runlevels could be determined, 0 is returned, a non-zero
failure code otherwise.
ENVIRONMENT
$RUNLEVEL
If $RUNLEVEL is set, runlevel will print this value as current
runlevel and ignore utmp.
$PREVLEVEL
If $PREVLEVEL is set, runlevel will print this value as previous
runlevel and ignore utmp.
FILES
/var/run/utmp
The utmp database runlevel reads the previous and current runlevel
from.
SEE ALSOsystemd(1), systemd.target(5), systemctl(1)systemd 236RUNLEVEL(8)
