Installing Ubuntu Desktop on Ubuntu Server

sudo apt install ubuntu-desktop

Using the installer to setup RAID1 (mirrored) boot disks

  • Under Guided storage configuration, select Custom storage layout and hit the space bar
  • Select Done and hit enter

  • Storage configuration

  • Clear all partitions from your drives (if existing partitions/RAID exist)
  • You should now have 2 identically-sized drives with all free space under AVAILABLE DEVICES
    • For each of your drives under AVAILABLE DEVICES...
    • Tab to select the local disk and hit enter
    • Tab to select Use As Boot Device (or Add As Another Boot Device) and hit enter
    • Tab- to select free space under that drive and hit enter
    • Tab- to select Add GPT Partition and hit enter
      • Tab, then hit enter
      • Tab to select Leave unformatted, then hit enter
      • Tab to select Create then hit enter
    • Select Create software RAID (md) and hit enter
    • Leave Name as md0 and tab
    • Leave RAID Level as 1 (mirrored) and tab
    • Tab to the first of you drives' partitions labeled as partition 2 and hit Space to choose it
    • Tab to the second of you drives' partitions labeled as partition 2 and hit Space to choose it
    • Tab to Create and hit enter
    • Under md0 select free space and hit enter
    • Select Add GPT Partition and hit enter
    • Set the Size to 2G and hit tab
    • Tab again, leaving Format set to ext4
    • On Mount, hit enter, then select /boot, then hit enter
    • Tab to select Create then hit enter
    • Under md0 select free space again and hit enter
    • Select Add GPT Partition and hit enter
    • Leave the Size blank and hit tab
    • Hit enter on Format, select Leave unformatted, and hit enter
    • Tab to select Create then hit enter
    • Select Create volume group (LVM) and hit enter
    • Leave Name set to vg0 and hit tab
    • Under md0 select partition 2 and hit space to choose it
    • Tab to Create and hit enter
    • Under vg0 (new) select free space and hit enter
    • Select Create Logical Volume and hit enter
    • Leave the Name set to lv-0
    • Select Create and hit enter
    • Select Done and hit enter
    • On the Confirm destructive action screen, select Continue and hit enter

Source.