1SYSTEMD-MACHINE-ID-COMMIsTy.sStEeRmVdI-CmEa(c8h)ine-id-cSoYmSmTiEtM.Ds-eMrAvCiHcIeNE-ID-COMMIT.SERVICE(8)
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NAME

6       systemd-machine-id-commit.service - Commit a transient machine ID to
7       disk
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SYNOPSIS

10       systemd-machine-id-commit.service
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DESCRIPTION

13       systemd-machine-id-commit.service is an early boot service responsible
14       for committing transient /etc/machine-id files to a writable disk file
15       system. See machine-id(5) for more information about machine IDs.
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17       This service is started after local-fs.target in case /etc/machine-id
18       is a mount point of its own (usually from a memory file system such as
19       "tmpfs") and /etc is writable. The service will invoke
20       systemd-machine-id-setup --commit, which writes the current transient
21       machine ID to disk and unmount the /etc/machine-id file in a race-free
22       manner to ensure that file is always valid and accessible for other
23       processes. See systemd-machine-id-setup(1) for details.
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25       The main use case of this service are systems where /etc/machine-id is
26       read-only and initially not initialized. In this case, the system
27       manager will generate a transient machine ID file on a memory file
28       system, and mount it over /etc/machine-id, during the early boot phase.
29       This service is then invoked in a later boot phase, as soon as /etc/
30       has been remounted writable and the ID may thus be committed to disk to
31       make it permanent.
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SEE ALSO

34       systemd(1), systemd-machine-id-setup(1), machine-id(5), systemd-
35       firstboot(1)
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39systemd 250                               SYSTEMD-MACHINE-ID-COMMIT.SERVICE(8)
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