telinit(8) [centos man page]

TELINIT(8)							      telinit								TELINIT(8)

NAME

       telinit - Change SysV runlevel

SYNOPSIS

       telinit [OPTIONS...] {COMMAND}

DESCRIPTION

       telinit may be used to change the SysV system runlevel. Since the concept of SysV runlevels is obsolete the runlevel requests will be
       transparently translated into systemd unit activation requests.

OPTIONS

       The following options are understood:

       --help
	   Prints a short help text and exits.

       --no-wall
	   Do not send wall message before reboot/halt/power-off.

       The following commands are understood:

       0
	   Power-off the machine. This is translated into an activation request for poweroff.target and is equivalent to systemctl poweroff.

       6
	   Reboot the machine. This is translated into an activation request for reboot.target and is equivalent to systemctl reboot.

       2, 3, 4, 5
	   Change the SysV runlevel. This is translated into an activation request for runlevel2.target, runlevel3.target, ... and is equivalent
	   to systemctl isolate runlevel2.target, systemctl isolate runlevel3.target, ...

       1, s, S
	   Change into system rescue mode. This is translated into an activation request for rescue.target and is equivalent to systemctl rescue.

       q, Q
	   Reload daemon configuration. This is equivalent to systemctl daemon-reload.

       u, U
	   Serialize state, reexecute daemon and deserialize state again. This is equivalent to systemctl daemon-reexec.

EXIT STATUS

       On success, 0 is returned, a non-zero failure code otherwise.

NOTES

       This is a legacy command available for compatibility only. It should not be used anymore, as the concept of runlevels is obsolete.

SEE ALSO

       systemd(1), systemctl(1), wall(1)

systemd 208																TELINIT(8)

RUNLEVEL(8)							     runlevel							       RUNLEVEL(8)

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.

SEE ALSO

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

systemd 237															       RUNLEVEL(8)