systemd-sysusers(8) — Linux manual page


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...]


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:

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

           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.

           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

           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.

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

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

           Do not pipe output into a pager.

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

           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

        2. Users, Groups, UIDs and GIDs on systemd systems

COLOPHON         top

       This page is part of the systemd (systemd system and service
       manager) project.  Information about the project can be found at
       ⟨⟩.  If you have
       a bug report for this manual page, see
       This page was obtained from the project's upstream Git repository
       ⟨⟩ on 2020-12-18.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2020-12-18.)  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

systemd 247                                          SYSTEMD-SYSUSERS(8)

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