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.

       firstboot.locale, firstboot.locale-message
           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".

       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.

       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).

       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).

       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).

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

       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.

       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.

       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).

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

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

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

       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.

       vmm.notify_socket
           Contains a AF_VSOCK or AF_UNIX address where to send a READY=1 notification datagram
           when the system has finished booting. See sd_notify(3) for more information. Note that
           in case the hypervisor does not support SOCK_DGRAM over AF_VSOCK, SOCK_SEQPACKET will
           be tried instead. The credential payload for AF_VSOCK should be in the form
           "vsock:CID:PORT".

           This feature is useful for hypervisors/VMMs or other processes on the host to receive
           a notification via VSOCK when a virtual machine has finished booting.

SEE ALSO

       systemd(1), kernel-command-line(7)

NOTES

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