NAME

       systemd.system-credentials - System Credentials

DESCRIPTION

       System and Service Credentials[1] are data objects that may be passed into booted systems or system
       services as they are invoked. They can be acquired from various external sources, and propagated into the
       system and from there into system services. Credentials may optionally be encrypted with a
       machine-specific key and/or locked to the local TPM2 device, and are only decrypted when the consuming
       service is invoked.

       System credentials may be used to provision and configure various aspects of the system. Depending on the
       consuming component credentials are only used on initial invocations or are needed for all invocations.

       Credentials may be used for any kind of data, binary or text, and may carry passwords, secrets,
       certificates, cryptographic key material, identity information, configuration, and more.

WELL KNOWN SYSTEM CREDENTIALS

       firstboot.keymap
           The console key mapping to set (e.g.  "de"). Read by systemd-firstboot(1), and only honoured if no
           console keymap has been configured before.

           Added in version 252.

       firstboot.locale, firstboot.locale-messages
           The system locale to set (e.g.  "de_DE.UTF-8"). Read by systemd-firstboot(1), and only honoured if no
           locale has been configured before.  firstboot.locale sets "LANG", while firstboot.locale-message sets
           "LC_MESSAGES".

           Added in version 252.

       firstboot.timezone
           The system timezone to set (e.g.  "Europe/Berlin"). Read by systemd-firstboot(1), and only honoured
           if no system timezone has been configured before.

           Added in version 252.

       login.issue
           The data of this credential is written to /etc/issue.d/50-provision.conf, if the file doesn't exist
           yet.  agetty(8) reads this file and shows its contents at the login prompt of terminal logins. See
           issue(5) for details.

           Consumed by /usr/lib/tmpfiles.d/provision.conf, see tmpfiles.d(5).

           Added in version 252.

       login.motd
           The data of this credential is written to /etc/motd.d/50-provision.conf, if the file doesn't exist
           yet.  pam_motd(8) reads this file and shows its contents as "message of the day" during terminal
           logins. See motd(5) for details.

           Consumed by /usr/lib/tmpfiles.d/provision.conf, see tmpfiles.d(5).

           Added in version 252.

       network.hosts
           The data of this credential is written to /etc/hosts, if the file doesn't exist yet. See hosts(5) for
           details.

           Consumed by /usr/lib/tmpfiles.d/provision.conf, see tmpfiles.d(5).

           Added in version 252.

       network.dns, network.search_domains
           DNS server information and search domains. Read by systemd-resolved.service(8).

           Added in version 253.

       passwd.hashed-password.root, passwd.plaintext-password.root
           May contain the password (either in UNIX hashed format, or in plaintext) for the root users. Read by
           both systemd-firstboot(1) and systemd-sysusers(1), and only honoured if no root password has been
           configured before.

           Added in version 252.

       passwd.shell.root
           The path to the shell program (e.g.  "/bin/bash") for the root user. Read by both systemd-
           firstboot(1) and systemd-sysusers(1), and only honoured if no root shell has been configured before.

           Added in version 252.

       ssh.authorized_keys.root
           The data of this credential is written to /root/.ssh/authorized_keys, if the file doesn't exist yet.
           This allows provisioning SSH access for the system's root user.

           Consumed by /usr/lib/tmpfiles.d/provision.conf, see tmpfiles.d(5).

           Added in version 252.

       sysusers.extra
           Additional sysusers.d(5) lines to process during boot.

           Added in version 252.

       sysctl.extra
           Additional sysctl.d(5) lines to process during boot.

           Added in version 252.

       tmpfiles.extra
           Additional tmpfiles.d(5) lines to process during boot.

           Added in version 252.

       fstab.extra
           Additional mounts to establish at boot. For details, see systemd-fstab-generator(8).

           Added in version 254.

       vconsole.keymap, vconsole.keymap_toggle, vconsole.font, vconsole.font_map, vconsole.font_unimap
           Console settings to apply, see systemd-vconsole-setup.service(8) for details.

           Added in version 253.

       getty.ttys.serial, getty.ttys.container
           Used for spawning additional login prompts, see systemd-getty-generator(8) for details.

           Added in version 254.

       vmm.notify_socket
           Configures an sd_notify(3) compatible AF_VSOCK socket the service manager will report status
           information, ready notification and exit status on. For details see systemd(1).

           Added in version 253.

       system.machine_id
           Takes a 128bit ID to initialize the machine ID from (if it is not set yet). Interpreted by the
           service manager (PID 1). For details see systemd(1).

           Added in version 254.

SEE ALSO

       systemd(1), kernel-command-line(7), smbios-type-11(7)

NOTES

        1. System and Service Credentials
           https://systemd.io/CREDENTIALS