SYSTEMD-MACHINE-ID-COMMIT.SERVICE(8) systemd-machine-id-commit.service SYSTEMD-MACHINE-ID-COMMIT.SERVICE(8)

.SH "NAME" systemd-machine-id-commit.service - Commit a transient machine ID to disk

.SH "SYNOPSIS"

.PP systemd-machine-id-commit.service

.SH "DESCRIPTION"

.PP systemd-machine-id-commit.service is an early boot service responsible for committing transient /etc/machine-id files to a writable disk file system. See [**machine-id**(5)](/man/os/systemd/machine-id.5) for more information about machine IDs.

.PP This service is started after local-fs.target in case /etc/machine-id is a mount point of its own (usually from a memory file system such as tmpfs) and /etc is writable. The service will invoke **systemd-machine-id-setup --commit**, which writes the current transient machine ID to disk and unmount the /etc/machine-id file in a race-free manner to ensure that file is always valid and accessible for other processes. See [**systemd-machine-id-setup**(1)](/man/os/systemd/systemd-machine-id-setup.1) for details.

.PP The main use case of this service are systems where /etc/machine-id is read-only and initially not initialized. In this case, the system manager will generate a transient machine ID file on a memory file system, and mount it over /etc/machine-id, during the early boot phase. This service is then invoked in a later boot phase, as soon as /etc/ has been remounted writable and the ID may thus be committed to disk to make it permanent.

.SH "SEE ALSO"

.PP [**systemd**(1)](/man/os/systemd/systemd.1), [**systemd-machine-id-setup**(1)](/man/os/systemd/systemd-machine-id-setup.1), [**machine-id**(5)](/man/os/systemd/machine-id.5), [**systemd-firstboot**(1)](/man/os/systemd/systemd-firstboot.1)

systemd 262.2

---

Document: systemd-machine-id-commit.service(8) from systemd 262.2-r1 (Chainguard OS)
Source: https://github.com/systemd/systemd