systemd-machine-id-commit

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`

## Description

`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-id 5 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-firstboot 1 to initialize the machine ID on mounted (but not booted) system images.

## Options

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.

## Exit status

On success, 0 is returned, a non-zero failure code otherwise.

## See Also

systemd 1, systemd-machine-id-commit.service 8, systemd-machine-id-setup 1, machine-id 5, systemd-firstboot 1