SYSTEMD.SYSTEM-CREDENTIALSsystemd.system-credentiSYSTEMD.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
systemd 252 SYSTEMD.SYSTEM-CREDENTIALS(7)
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