runuser(1) that does not require authentication and provide separate PAM configuration. If the PAM session is not required at all then the recommend solution is to use command setpriv(1).ENV_SUPATH (string)session required pam_lastlog.so nowtmpsetpriv(1), login.defs(5), shells(5), pam(8), runuser(8) Linux Kernel Archive
- -c, --command=command
- Pass command to the shell with the -c option.
- -f, --fast
- Pass -f to the shell, which may or may not be useful, depending on the shell.
- -g, --group=group
- Specify the primary group. This option is available to the root user only.
- -G, --supp-group=group
- 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 --group is unspecified.
- -, -l, --login
- Start the shell as a login shell with an environment similar to a real login:
- clears all the environment variables except TERM
- initializes the environment variables HOME, SHELL, USER, LOGNAME, and PATH
- changes to the target user's home directory
- sets argv of the shell to '-' in order to make the shell a login shell
- -m, -p, --preserve-environment
- Preserve the entire environment, i.e. it does not set HOME, SHELL, USER nor LOGNAME. This option is ignored if the option --login is specified.
- -P, --pty
- Create pseudo-terminal for the session. The independent
terminal provides better security as user does not share terminal with the
original session. This allow to avoid TIOCSTI ioctl terminal injection and
another security attacks against terminal file descriptors. The all
session is also possible to move to background (e.g. "su --pty -
usename -c application &"). If the pseudo-terminal is enabled
then su command works as a proxy between the sessions (copy stdin and
- -s, --shell=shell
- 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 --shell
- the shell specified in the environment variable SHELL, if the --preserve-environment option 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 --shell option and the SHELL environment variables are ignored unless the calling user is root.
- Same as -c but do not create a new session. (Discouraged.)
- -V, --version
- Display version information and exit.
- -h, --help
- Display help text and exit.
Delay in seconds in case of an authentication failure. The number must be a non-negative integer.ENV_PATH (string)
Defines the PATH environment variable for a regular user. The default value is /usr/local/bin:/bin:/usr/bin.ENV_ROOTPATH (string)
Defines the PATH environment variable for root. The default value is /usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin.ALWAYS_SET_PATH (boolean)
If set to yes and --login and --preserve-environment were not specified su initializes PATH.
- 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
- command specific logindef config file
- global logindef config file