systemd-homed.service

SYSTEMD-HOMED.SERVICE(8)      systemd-homed.service     SYSTEMD-HOMED.SERVICE(8)



NAME
       systemd-homed.service, systemd-homed - Home Area/User Account Manager

SYNOPSIS
       systemd-homed.service

       /usr/lib/systemd/systemd-homed

DESCRIPTION
       systemd-homed is a system service that may be used to create, remove,
       change or inspect home areas (directories and network mounts and real or
       loopback block devices with a filesystem, optionally encrypted).

       Most of systemd-homed's functionality is accessible through the
       homectl(1) command.

       See the Home Directories[1] documentation for details about the format
       and design of home areas managed by systemd-homed.service.

       Each home directory managed by systemd-homed.service synthesizes a local
       user and group. These are made available to the system using the
       User/Group Record Lookup API via Varlink[2], and thus may be browsed with
       userdbctl(1).

KEY MANAGEMENT
       User records are cryptographically signed with a public/private key pair
       (the signature is part of the JSON record itself). For a user to be
       permitted to log in locally the public key matching the signature of
       their user record must be installed. For a user record to be modified
       locally the private key matching the signature must be installed locally,
       too. The keys are stored in the /var/lib/systemd/home/ directory:

       /var/lib/systemd/home/local.private
           The private key of the public/private key pair used for local
           records. Currently, only a single such key may be installed.

       /var/lib/systemd/home/local.public
           The public key of the public/private key pair used for local records.
           Currently, only a single such key may be installed.

       /var/lib/systemd/home/*.public
           Additional public keys. Any users whose user records are signed with
           any of these keys are permitted to log in locally. An arbitrary
           number of keys may be installed this way.

       All key files listed above are in PEM format.

       In order to migrate a home directory from a host "foobar" to another host
       "quux" it is hence sufficient to copy /var/lib/systemd/home/local.public
       from the host "foobar" to "quux", maybe calling the file on the
       destination /var/lib/systemd/home/foobar.public, reflecting the origin of
       the key. If the user record should be modifiable on "quux" the pair
       /var/lib/systemd/home/local.public and
       /var/lib/systemd/home/local.private need to be copied from "foobar" to
       "quux", and placed under the identical paths there, as currently only a
       single private key is supported per host. Note of course that the latter
       means that user records generated/signed before the key pair is copied
       in, lose their validity.

SEE ALSO
       systemd(1), homed.conf(5), homectl(1), pam_systemd_home(8), userdbctl(1),
       org.freedesktop.home1(5)

NOTES
        1. Home Directories
           https://systemd.io/HOME_DIRECTORY

        2. User/Group Record Lookup API via Varlink
           https://systemd.io/USER_GROUP_API



systemd 247                                             SYSTEMD-HOMED.SERVICE(8)