focal (8) systemd-sysusers.service.8.gz

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