systemd-sysusers(8) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXIT STATUS | SEE ALSO | NOTES | COLOPHON

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

NAME         top

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

SYNOPSIS         top

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

       systemd-sysusers.service

DESCRIPTION         top

       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         top

       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.

       --image=image
           Takes a path to a disk image file or block device node. If
           specified all operations are applied to file system in the
           indicated disk image. This is similar to --root= but operates on
           file systems stored in disk images or block devices. The disk
           image should either contain just a file system or a set of file
           systems within a GPT partition table, following the Discoverable
           Partitions Specification[1]. For further information on supported
           disk images, see systemd-nspawn(1)'s switch of the same name.

       --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         top

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

SEE ALSO         top

       systemd(1), sysusers.d(5), Users, Groups, UIDs and GIDs on systemd
       systems[2]

NOTES         top

        1. Discoverable Partitions Specification
           https://systemd.io/DISCOVERABLE_PARTITIONS

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

COLOPHON         top

       This page is part of the systemd (systemd system and service manager)
       project.  Information about the project can be found at 
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have a bug
       report for this manual page, see
       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.  This
       page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2020-08-13.  (At that
       time, the date of the most recent commit that was found in the repos‐
       itory was 2020-08-11.)  If you discover any rendering problems in
       this HTML version of the page, or you believe there is a better or
       more up-to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not part
       of the original manual page), send a mail to man-pages@man7.org

systemd 246                                              SYSTEMD-SYSUSERS(8)

Pages that refer to this page: sysusers.d(5)30-systemd-environment-d-generator(7)systemd.directives(7)systemd.index(7)