Section (1) runuser
runuser — run a command with substitute user and group ID
−u user [ [
−−] command [ argument... ]
−] [ user [ argument...
allows to run commands with a substitute user and group ID.
If the option
−u is not
given, it falls back to su-compatible semantics and
a shell is executed. The difference between the commands
su is that
not ask for a password (because it may be executed by the
root user only) and it uses a different PAM configuration.
The command runuser does not have to be
installed with set-user-ID permissions.
If the PAM session is not required then recommended solution is to use setpriv(1) command.
When called without arguments, runuser defaults to running an interactive shell as root.
For backward compatibility, runuser defaults to not
change the current directory and to only set the environment
LOGNAME if the target
user is not root). This version
of runuser uses
PAM for session management.
commandto the shell with the
−fto the shell, which may or may not be useful depending on the shell.
The primary group to be used. This option is allowed for the root user only.
Specify a supplemental group. This option is available to the root user only. The first specified supplementary group is also used as a primary group if the option
−, −l, −−login
Start the shell as a login shell with an environment similar to a real login:
clears all the environment variables except for
TERMand variables specified by
initializes the environment variables
changes to the target user_zsingle_quotesz_s home directory
sets argv of the shell to _zsingle_quotesz_
−_zsingle_quotesz_ in order to make the shell a login shell
−m, −p, −−preserve−environment
Preserve the entire environment, i.e. it does not set
LOGNAME. The option is ignored if the option
Run the specified shell instead of the default. The shell to run is selected according to the following rules, in order:
the shell specified with
the shell specified in the environment variable
−−preserve−environmentoption is used
the shell listed in the passwd entry of the target user
If the target user has a restricted shell (i.e. not listed in /etc/shells) the
−−shelloption and the
SHELLenvironment variables are ignored unless the calling user is root.
−c ,but do not create a new session. (Discouraged.)
Don_zsingle_quotesz_t reset environment variables specified in comma separated list when clears environment for
−−login. The whitelist is ignored for the environment variables
Display version information and exit.
Display help text and exit.
configuration files. The following configuration items are
relevant for runuser:
Defines the PATH environment variable for a regular user. The default value is
Defines the PATH environment variable for root. The default value is
If set to yes and −−login and −−preserve−environment were not specified runuser initializes
The environment variable PATH may be different on systems where /bin and /sbin are merged into /usr.
runuser normally returns the exit status of the command it executed. If the command was killed by a signal, runuser returns the number of the signal plus 128.
Exit status generated by runuser itself:
Generic error before executing the requested command
The requested command could not be executed
The requested command was not found
default PAM configuration file
PAM configuration file if −−login is specified
runuser specific logindef config file
global logindef config file
This runuser command was derived from coreutils_zsingle_quotesz_ su, which was based on an implementation by David MacKenzie, and the Fedora runuser command by Dan Walsh.
The runuser command is part of the util-linux package and is available from Linux Kernel Archive