systemd Developer Didier Roche didrocks@ubuntu.com systemd-machine-id-commit 1 systemd-machine-id-commit Commit transient machine ID to /etc/machine-id systemd-machine-id-commit systemd-machine-id-commit may be used to write on disk any transient machine ID mounted as a temporary file system in /etc/machine-id at boot time. See machine-id5 for more information about this file. This tool will execute no operation if /etc/machine-id doesn't contain any valid machine ID, isn't mounted as an independent temporary file system, of /etc is read-only. If those conditions are met, it will then write current machine ID to disk and unmount the transient /etc/machine-id file in a race-free manner to ensure that this 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-firstboot1 to initialize the machine ID on mounted (but not booted) system images. The following options are understood: --root=root Takes a directory path as an argument. All paths will be prefixed with the given alternate root path, including config search paths. On success, 0 is returned, a non-zero failure code otherwise. systemd1, systemd-machine-id-commit.service8, systemd-machine-id-setup1, machine-id5, systemd-firstboot1