systemd systemd.system-credentials 7 systemd.system-credentials System Credentials System and Service Credentials 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. firstboot.keymap The console key mapping to set (e.g. de). Read by systemd-firstboot1, and only honoured if no console keymap has been configured before. firstboot.locale firstboot.locale-messages The system locale to set (e.g. de_DE.UTF-8). Read by systemd-firstboot1, 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-firstboot1, 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 does not exist yet. agetty8 reads this file and shows its contents at the login prompt of terminal logins. See issue5 for details. Consumed by /usr/lib/tmpfiles.d/provision.conf, see tmpfiles.d5. login.motd The data of this credential is written to /etc/motd.d/50-provision.conf, if the file does not exist yet. pam_motd8 reads this file and shows its contents as "message of the day" during terminal logins. See motd5 for details. Consumed by /usr/lib/tmpfiles.d/provision.conf, see tmpfiles.d5. network.hosts The data of this credential is written to /etc/hosts, if the file does not exist yet. See hosts5 for details. Consumed by /usr/lib/tmpfiles.d/provision.conf, see tmpfiles.d5. network.dns network.search_domains DNS server information and search domains. Read by systemd-resolved.service8. network.conf.* network.link.* network.netdev.* network.network.* Configures network devices. Read by systemd-network-generator.service8. These credentials should contain valid networkd.conf5, systemd.link5, systemd.netdev5, systemd.network5 configuration data. From each matching credential a separate file is created. Example: the contents of a credential network.link.50-foobar will be copied into a file 50-foobar.link. Note that the resulting files are created world-readable, it is hence recommended to not include secrets in these credentials, but supply them via separate credentials directly to systemd-networkd.service, e.g. network.wireguard.* as described below. network.wireguard.* Configures secrets for WireGuard netdevs. Read by systemd-networkd.service8. For more information, refer to the [WireGuard] section of systemd.netdev5. 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-firstboot1 and systemd-sysusers8, 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-firstboot1 and systemd-sysusers8, and only honoured if no root shell has been configured before. ssh.ephemeral-authorized_keys-all Provides additional public keys, given in the customary authorized_keys format, for all users, for incoming connections via the generated AF_VSOCK and AF_UNIX socket units. The intended use of this is for a host system (in either VM or container configurations) to generate a keypair and inject the public key into the guest, using the private key to connect to any user account on the guest via ssh, without further authentication. Consumed by systemd-ssh-generator8. ssh.authorized_keys.root The data of this credential is written to /root/.ssh/authorized_keys, if the file does not exist yet. This allows provisioning SSH access for the system's root user. Consumed by /usr/lib/tmpfiles.d/provision.conf, see tmpfiles.d5. ssh.listen May be used to configure SSH sockets the system shall be reachable on. See systemd-ssh-generator8 for details. sysusers.extra Additional sysusers.d5 lines to process during boot. sysctl.extra Additional sysctl.d5 lines to process during boot. tmpfiles.extra Additional tmpfiles.d5 lines to process during boot. fstab.extra Additional mounts to establish at boot. For details, see systemd-fstab-generator8. vconsole.keymap vconsole.keymap_toggle vconsole.font vconsole.font_map vconsole.font_unimap Console settings to apply, see systemd-vconsole-setup.service8 for details. getty.auto Used for controlling the execution mode of systemd-getty-generator. See systemd-getty-generator8 for details. getty.ttys.serial getty.ttys.container Used for spawning additional login prompts, see systemd-getty-generator8 for details. journal.forward_to_socket Used by systemd-journald8 to determine where to forward log messages for socket forwarding, see journald.conf5 for details. journal.storage Used by systemd-journald8 to determine where to store journal files, see journald.conf5 for details. vmm.notify_socket Configures an sd_notify3 compatible AF_VSOCK socket the service manager will report status information, ready notification and exit status on. For details see systemd1. shell.prompt.prefix shell.prompt.suffix Defines strings to prefix and suffix any interactive UNIX shell prompt with. For details see pam_systemd8. shell.welcome Define a string to print when an interactive UNIX shell initializes. For details see pam_systemd8. 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 systemd1. system.hostname Accepts a (transient) hostname to configure during early boot. The static hostname specified in /etc/hostname, if configured, takes precedence over this setting. Interpreted by the service manager (PID 1). For details see systemd1. home.add-signing-key.* Adds a new signing key for user records to the system. The credential contents should contain a user signing key, for example as reported by homectl get-signing-key. Multiple keys may be specified, and they will be put in place under the name of the credential name suffix (which must itself carry the .public suffix). For details see homectl1. home.create.* Creates a new home area for the specified user with the user record data passed in. For details see homectl1. home.register.* Registers an existing home area for the specified user with the user record data passed in. For details see homectl1. cryptsetup.passphrase cryptsetup.tpm2-pin cryptsetup.fido2-pin cryptsetup.pkcs11-pin cryptsetup.luks2-pin Specifies the passphrase/PINs to use for unlock encrypted storage volumes. For details see systemd-cryptsetup8. systemd.extra-unit.* systemd.unit-dropin.* These credentials specify extra units and drop-ins to add to the system. For details see systemd-debug-generator8. udev.conf.* udev.rules.* Configures udev configuration file and udev rules. Read by systemd-udev-load-credentials.service, which invokes udevadm control --load-credentials. These credentials directly translate to a matching udev.conf5 or udev7 rules file. Example: the contents of a credential udev.conf.50-foobar will be copied into a file /run/udev/udev.conf.d/50-foobar.conf, and udev.rules.50-foobar will be copied into a file /run/udev/rules.d/50-foobar.rules. See udev7, udev.conf5, and udevadm8 for details. import.pull Specified disk images (tarballs and DDIs) to automatically download and install at boot. For details see systemd-import-generator8. userdb.user.* userdb.group.* userdb.transient.user.* userdb.transient.group.* Configure JSON user and group records. Read by systemd-userdb-load-credentials.service, which invokes userdbctl load-credentials. These credentials directly translate to matching JSON User and JSON Group records. Example: the contents of a credential userdb.user.foobar will be copied into a file /etc/userdb/foobar.user, and userdb.group.foobar will be copied into a file /etc/userdb/foobar.group. Symlinks for the uid/gid will also be created in /etc/userdb/, as well as the corresponding.membership files. See systemd-userdbd.service7, nss-systemd8, and userdbctl1 for details. Any passed user records must contain uid and gid fields. Any passed group records must contain a gid field. For both user and group records, the credential suffix (for userdb.user.foobar the suffix is foobar) must match the user or group name field from the user or group record. Note that the records created for userdb.user.* and userdb.group.* credentials are created in /etc/userdb/ and the records created for userdb.transient.user.* and userdb.transient.group.* are created in /run/userdb/ (/etc/passwd and /etc/group are not modified). fsck.* Read by systemd-fsck@.service, systemd-fsck-root.service, and systemd-fsck-usr.service. See systemd-fsck@.service8 for more details. quotacheck.* Read by systemd-quotacheck@.service and systemd-quotacheck-root.service. See systemd-quotacheck8 for more details. systemd1 kernel-command-line7 smbios-type-117