зафиксируйте временный идентификатор машины на диске  (Commit a transient machine ID to disk)
  
Имя (Name)
systemd-machine-id-commit.service - Commit a transient machine ID
       to disk
Синопсис (Synopsis)
systemd-machine-id-commit.service
Описание (Description)
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) for more information
       about machine IDs.
       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) for details.
       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.
Смотри также (See also)
systemd(1), systemd-machine-id-setup(1), machine-id(5),
       systemd-firstboot(1)