systemd-machine-id-setup: add page (#11447)

* systemd-machine-id-setup: add page

---------

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
Co-authored-by: Juri Dispan <juri.dispan@posteo.net>

pages/linux/systemd-machine-id-setup.md

@@ -0,0 +1,21 @@
+# systemd-machine-id-setup
+
+> Initialize the machine ID stored in `/etc/machine-id` at install time with a provisioned or randomly generated ID.
+> Note: Always use `sudo` to execute these commands as they require elevated privileges.
+> More information: <https://www.freedesktop.org/software/systemd/man/systemd-machine-id-setup.html>.
+
+- Print the generated or committed machine ID:
+
+`systemd-machine-id-setup --print`
+
+- Specify an image policy:
+
+`systemd-machine-id-setup --image-policy={{your_policy}}`
+
+- Display the output as JSON:
+
+`sudo systemd-machine-id-setup --json=pretty`
+
+- Operate on a disk image instead of a directory tree:
+
+`systemd-machine-id-setup --image={{/path/to/image}}`