<root
SYSTEMD-GPT-AUTO-GENERATOR(8)       systemd-gpt-auto-generator      SYSTEMD-GPT-AUTO-GENERATOR(8)

NAME
       systemd-gpt-auto-generator - Generator for automatically discovering and mounting root,
       /home and /srv partitions, as well as discovering and enabling swap partitions, based on
       GPT partition type GUIDs.

SYNOPSIS
       /lib/systemd/system-generators/systemd-gpt-auto-generator

DESCRIPTION
       systemd-gpt-auto-generator is a unit generator that automatically discovers root, /home,
       /srv and swap partitions and creates mount and swap units for them, based on the partition
       type GUIDs of GUID partition tables (GPT). It implements the Discoverable Partitions
       Specification[1]. Note that this generator has no effect on non-GPT systems, or where the
       directories under the mount points are already non-empty. Also, on systems where the units
       are explicitly configured (for example, listed in fstab(5)), the units this generator
       creates are overridden, but additional automatic dependencies might be created.

       This generator will only look for root partitions on the same physical disk the EFI System
       Partition (ESP) is located on. It will only look for the other partitions on the same
       physical disk the root file system is located on. These partitions will not be searched on
       systems where the root file system is distributed on multiple disks, for example via btrfs
       RAID.

       systemd-gpt-auto-generator is useful for centralizing file system configuration in the
       partition table and making manual configuration in /etc/fstab or suchlike unnecessary.

       This generator looks for the partitions based on their partition type GUID. The following
       partition type GUIDs are identified:

       Table 1. Partition Type GUIDs
       ┌─────────────────────────────────────┬─────────────────────────┬──────────────────────────┐
       │Partition Type GUID                  │ Name                    │ Explanation              │
       ├─────────────────────────────────────┼─────────────────────────┼──────────────────────────┤
       │44479540-f297-41b2-9af7-d131d5f0458a │ Root Partition (x86)    │ On 32-bit x86 systems,   │
       │                                     │                         │ the first x86 root       │
       │                                     │                         │ partition on the disk    │
       │                                     │                         │ the EFI ESP is located   │
       │                                     │                         │ on is mounted to the     │
       │                                     │                         │ root directory /.        │
       ├─────────────────────────────────────┼─────────────────────────┼──────────────────────────┤
       │4f68bce3-e8cd-4db1-96e7-fbcaf984b709 │ Root Partition (x86-64) │ On 64-bit x86 systems,   │
       │                                     │                         │ the first x86-64 root    │
       │                                     │                         │ partition on the disk    │
       │                                     │                         │ the EFI ESP is located   │
       │                                     │                         │ on is mounted to the     │
       │                                     │                         │ root directory /.        │
       ├─────────────────────────────────────┼─────────────────────────┼──────────────────────────┤
       │69dad710-2ce4-4e3c-b16c-21a1d49abed3 │ Root Partition (32-bit  │ On 32-bit ARM systems,   │
       │                                     │ ARM)                    │ the first ARM root       │
       │                                     │                         │ partition on the disk    │
       │                                     │                         │ the EFI ESP is located   │
       │                                     │                         │ on is mounted to the     │
       │                                     │                         │ root directory /.        │
       ├─────────────────────────────────────┼─────────────────────────┼──────────────────────────┤
       │b921b045-1df0-41c3-af44-4c6f280d3fae │ Root Partition (64-bit  │ On 64-bit ARM systems,   │
       │                                     │ ARM)                    │ the first ARM root       │
       │                                     │                         │ partition on the disk    │
       │                                     │                         │ the EFI ESP is located   │
       │                                     │                         │ on is mounted to the     │
       │                                     │                         │ root directory /.        │
       ├─────────────────────────────────────┼─────────────────────────┼──────────────────────────┤
       │933ac7e1-2eb4-4f13-b844-0e14e2aef915 │ Home Partition          │ The first home partition │
       │                                     │                         │ on the disk the root     │
       │                                     │                         │ partition is located on  │
       │                                     │                         │ is mounted to /home.     │
       ├─────────────────────────────────────┼─────────────────────────┼──────────────────────────┤
       │3b8f8425-20e0-4f3b-907f-1a25a76f98e8 │ Server Data Partition   │ The first server data    │
       │                                     │                         │ partition on the disk    │
       │                                     │                         │ the root partition is    │
       │                                     │                         │ located on is mounted to │
       │                                     │                         │ /srv.                    │
       ├─────────────────────────────────────┼─────────────────────────┼──────────────────────────┤
       │0657fd6d-a4ab-43c4-84e5-0933c84b4f4f │ Swap                    │ All swap partitions      │
       │                                     │                         │ located on the disk the  │
       │                                     │                         │ root partition is        │
       │                                     │                         │ located on are enabled.  │
       └─────────────────────────────────────┴─────────────────────────┴──────────────────────────┘

       The /home and /srv partitions may be encrypted in LUKS format. In this case, a device
       mapper device is set up under the names /dev/mapper/home and /dev/mapper/srv. Note that
       this might create conflicts if the same partition is listed in /etc/crypttab with a
       different device mapper device name.

       Mount and automount units for the EFI System Partition (ESP), mounting it to /boot, are
       generated on EFI systems where the boot loader communicates the used ESP to the operating
       system. Since this generator creates an automount unit, the mount will only be activated
       on-demand, when accessed. On systems where /boot is an explicitly configured mount (for
       example, listed in fstab(5)) or where the /boot mount point is non-empty, no mount units
       are generated.

       When using this generator in conjunction with btrfs file systems, make sure to set the
       correct default subvolumes on them, using btrfs subvolume set-default.

       systemd-gpt-auto-generator implements systemd.generator(7).

SEE ALSO
       systemd(1), systemd.mount(5), systemd.swap(5), systemd-fstab-generator(8), systemd-
       cryptsetup@.service(8), cryptsetup(8), fstab(5), btrfs(8)

NOTES
        1. Discoverable Partitions Specification
           http://www.freedesktop.org/wiki/Specifications/DiscoverablePartitionsSpec/

systemd 229                                                         SYSTEMD-GPT-AUTO-GENERATOR(8)

Go-to-top  




Designed by SanjuD(@ngineerbabu)