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NAME | SYNOPSIS | OVERVIEW | DESCRIPTION | OPTIONS | EXIT STATUS | ENVIRONMENT | FILES | SEE ALSO | COLOPHON |
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RUNLEVEL(8) runlevel RUNLEVEL(8)
runlevel - Print previous and current SysV runlevel
runlevel [options...]
"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 │
└──────────┴───────────────────┘
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.
The following option is understood:
--help
Print a short help text and exit.
If one or both runlevels could be determined, 0 is returned, a
non-zero failure code otherwise.
$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.
/run/utmp
The utmp database runlevel reads the previous and current
runlevel from.
Added in version 237.
systemd(1), systemd.target(5), systemctl(1)
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 page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-06-13.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
systemd 257~devel RUNLEVEL(8)
Pages that refer to this page: boot(7), systemd.directives(7), systemd.index(7)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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