SYSTEMD-SYSUSERS(8) 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.
--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 m[blue]Discoverable
Partitions Specificationm[][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
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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), m[blue]Users, Groups, UIDs and
GIDs on systemd systemsm[][2]
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NOTES
1. Discoverable Partitions Specification
https://systemd.io/DISCOVERABLE_PARTITIONS
2. Users, Groups, UIDs and GIDs on systemd systems
https://systemd.io/UIDS-GIDS
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