runlevel(8) — Linux manual page


RUNLEVEL(8)                       runlevel                       RUNLEVEL(8)

NAME         top

       runlevel - Print previous and current SysV runlevel

SYNOPSIS         top

       runlevel [options...]

OVERVIEW         top

       "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        │   │
       │1        │     │
       │2, 3, 4  │ │
       │5        │  │
       │6        │     │

DESCRIPTION         top

       runlevel prints the previous and current SysV runlevel if they are

       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         top

       The following option is understood:

           Print a short help text and exit.

EXIT STATUS         top

       If one or both runlevels could be determined, 0 is returned, a
       non-zero failure code otherwise.

ENVIRONMENT         top

           If $RUNLEVEL is set, runlevel will print this value as current
           runlevel and ignore utmp.

           If $PREVLEVEL is set, runlevel will print this value as previous
           runlevel and ignore utmp.

FILES         top

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

SEE ALSO         top

       systemd(1),, systemctl(1)

COLOPHON         top

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systemd 246                                                      RUNLEVEL(8)

Pages that refer to this page: 30-systemd-environment-d-generator(7)boot(7)systemd.directives(7)systemd.index(7)