SYSTEMD.SYSTEM-CREDENTIALS(7)

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).

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.

SEE ALSO

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

NOTES

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