systemd-sysusers(8)

SYSTEMD-SYSUSERS(8)            systemd-sysusers            SYSTEMD-SYSUSERS(8)

NAME
       systemd-sysusers, systemd-sysusers.service - Allocate system users and
       groups

SYNOPSIS
       systemd-sysusers [OPTIONS...] [CONFIGFILE...]

       systemd-sysusers.service

DESCRIPTION
       systemd-sysusers creates system users and groups, based on the file
       format and location specified in sysusers.d(5).

       If invoked with no arguments, it applies all directives from all files
       found in the directories specified by sysusers.d(5). When invoked with
       positional arguments, if option --replace=PATH is specified, arguments
       specified on the command line are used instead of the configuration
       file PATH. Otherwise, just the configuration specified by the command
       line arguments is executed. The string "-" may be specified instead of
       a filename to instruct systemd-sysusers to read the configuration from
       standard input. If only the basename of a file is specified, all
       configuration directories are searched for a matching file and the file
       found that has the highest priority is executed.

OPTIONS
       The following options are understood:

       --root=root
           Takes a directory path as an argument. All paths will be prefixed
           with the given alternate root path, including config search paths.

       --replace=PATH
           When this option is given, one ore more positional arguments must
           be specified. All configuration files found in the directories
           listed in sysusers.d(5) will be read, and the configuration given
           on the command line will be handled instead of and with the same
           priority as the configuration file PATH.

           This option is intended to be used when package installation
           scripts are running and files belonging to that package are not yet
           available on disk, so their contents must be given on the command
           line, but the admin configuration might already exist and should be
           given higher priority.

           Example 1. RPM installation script for radvd

               echo 'u radvd - "radvd daemon"' | \
                         systemd-sysusers --replace=/usr/lib/sysusers.d/radvd.conf -

           This will create the radvd user as if
           /usr/lib/sysusers.d/radvd.conf was already on disk. An admin might
           override the configuration specified on the command line by placing
           /etc/sysusers.d/radvd.conf or even
           /etc/sysusers.d/00-overrides.conf.

           Note that this is the expanded form, and when used in a package,
           this would be written using a macro with "radvd" and a file
           containing the configuration line as arguments.

       --inline
           Treat each positional argument as a separate configuration line
           instead of a file name.

       --cat-config
           Copy the contents of config files to standard output. Before each
           file, the filename is printed as a comment.

       --no-pager
           Do not pipe output into a pager.

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

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

SEE ALSO
       systemd(1), sysusers.d(5), Users, Groups, UIDs and GIDs on systemd
       systems[1]

NOTES
        1. Users, Groups, UIDs and GIDs on systemd systems
           https://systemd.io/UIDS-GIDS

systemd 245                                                SYSTEMD-SYSUSERS(8)