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-message 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 doesn't 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 doesn't 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 doesn't 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. 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-sysusers1, 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-sysusers1, 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.d5. 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. vconsole.keymap vconsole.keymap_toggle vconsole.font vconsole.font_map vconsole.font_unimap Console settings to apply, see systemd-vconsole-setup.service8 for details. vmm.notify_socket This credential is parsed looking for an AF_VSOCK or AF_UNIX address where to send a READY=1 notification datagram when the system has finished booting. See: sd_notify3 This is useful for hypervisors/VMMs or other processes on the host to receive a notification via VSOCK when a virtual machine has finished booting. 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. systemd1, kernel-command-line7