NAME | SYNOPSIS | OVERVIEW | DESCRIPTION | OPTIONS | EXIT STATUS | ENVIRONMENT | FILES | SEE ALSO | COLOPHON

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        │ poweroff.target   │
       ├─────────┼───────────────────┤
       │1        │ rescue.target     │
       ├─────────┼───────────────────┤
       │2, 3, 4  │ multi-user.target │
       ├─────────┼───────────────────┤
       │5        │ graphical.target  │
       ├─────────┼───────────────────┤
       │6        │ reboot.target     │
       └─────────┴───────────────────┘

DESCRIPTION         top

       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         top

       The following option is understood:

       --help
           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

       $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         top

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

SEE ALSO         top

       systemd(1), systemd.target(5), systemctl(1)

COLOPHON         top

       This page is part of the systemd (systemd system and service manager)
       project.  Information about the project can be found at 
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have a bug
       report for this manual page, see 
       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.  This
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       to man-pages@man7.org

systemd 230                                                      RUNLEVEL(8)