systemd-machine-id-setup 命令

常用示例

说明

systemd-machine-id-setup initializes the machine ID stored in /etc/machine-id. It is intended for use by system installer tools at install time, or when /etc/machine-id is empty or missing. When invoked without --commit, the tool initializes the machine ID using the first available source in this order: 1. A valid ID from /run/machine-id 2. An existing D-Bus machine ID 3. A machine ID from the system.machine_id credential 4. A UUID from the KVM virtual machine configuration 5. A UUID from the container environment configuration 6. A newly generated random ID as a fallback The --commit option is used to convert a transient machine ID (mounted into memory during early boot) into a persistent one written to disk.

参数

--print

Print the machine ID after the setup operation completes

--commit

Commit a transient machine ID to persistent disk storage. Has no effect if /etc/machine-id is not mounted from memory or if /etc/ is read-only. Primarily used by systemd-machine-id-commit.service

--root _path_

Operate on the specified root directory instead of the real root. All paths including /etc/machine-id are prefixed with the given path

--image _path_

Operate on the specified disk image (device node or regular file) instead of a directory tree

--image-policy _policy_

Specify an image mounting policy string when using --image. Defaults to the "*" policy (all recognized file systems are used)

-h, --help

Show brief help and exit

--version

Show version information and exit