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systemd 245
Oct 10, 2016

systemd-sysv

system and service manager - SysV links

systemd

system and service manager

upstart-sysv

event-based init daemon - SysV links

runit-init

system-wide service supervision (as init system)

sysvinit-core

System-V-like init utilities

systemd-sysvcompat

sysvinit compat for systemd

sysvinit

Linux System V Init

systemd-sysvinit

System V init tools

NAME

runlevel - Print previous and current SysV runlevel

SYNOPSIS

runlevel [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

DESCRIPTION

runlevel 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

/run/utmp
The utmp database runlevel reads the previous and current runlevel from.
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