SYSTEMD-MACHINE-ID-COMMIT.SERVICE(8) - phpMan

SYSTEMD-MACHINE-ID-COMMIT.SERVICsystemd-machine-id-commit.serSYSTEMD-MACHINE-ID-COMMIT.SERVICE(8)



NAME
       systemd-machine-id-commit.service - Commit transient machine-id to disk

SYNOPSIS
       systemd-machine-id-commit.service

       /usr/lib/systemd/systemd-machine-id-commit

DESCRIPTION
       systemd-machine-id-commit.service is a service responsible for committing any transient
       /etc/machine-id file to a writable file system. See machine-id(5) for more information
       about this file.

       This service is started shortly after local-fs.target if /etc/machine-id is an independent
       mount point (probably a tmpfs one) and /etc is writable.  systemd-machine-id-commit will
       then write current machine ID to disk and unmount the transient /etc/machine-id file in a
       race-free manner to ensure that file is always valid for other processes.

       Note that the traditional way to initialize the machine ID in /etc/machine-id is to use
       systemd-machine-id-setup by system installer tools. You can also use systemd-firstboot(1)
       to initialize the machine ID on mounted (but not booted) system images. The main use case
       for that service is /etc/machine-id being an empty file at boot and initrd chaining to
       systemd giving it a read only file system that will be turned read-write later during the
       boot process.

       There is no consequence if that service fails other than a newer machine-id will be
       generated during next system boot.

SEE ALSO
       systemd(1), systemd-machine-id-commit(1), systemd-machine-id-setup(1), machine-id(5),
       systemd-firstboot(1)



systemd 219                                                  SYSTEMD-MACHINE-ID-COMMIT.SERVICE(8)

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