grub-probe: add page

pages/linux/grub-probe.md

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+# grub-probe
+
+> Probe device information for a particular path or device.
+> More information: <https://www.gnu.org/software/grub/manual/grub/html_node/Invoking-grub_002dprobe.html>.
+
+- Get GRUB filesystem module for a path:
+
+`sudo grub-probe {{[-t|--target]}} fs {{/boot/grub}}`
+
+- Get the system device containing a path:
+
+`sudo grub-probe {{[-t|--target]}} device {{/boot/grub}}`
+
+- Get GRUB disk name for a system device:
+
+`sudo grub-probe {{[-t|--target]}} drive {{/dev/sdX}} {{[-d|--device]}}`
+
+- Get filesystem UUID:
+
+`sudo grub-probe {{[-t|--target]}} fs_uuid {{/boot/grub}}`
+
+- Get filesystem label:
+
+`sudo grub-probe {{[-t|--target]}} fs_label {{/boot/grub}}`
+
+- Get MBR partition type code(two hexadecimal digits):
+
+`sudo grub-probe {{[-t|--target]}} msdos_parttype {{/dev/sdX}}`
+
+- Probe using a custom device map:
+
+`sudo grub-probe {{[-t|--target]}} drive {{/boot/grub}} {{[-m|--device-map]}} {{path/to/custom_device.map}}`