The main installation is slightly different in 24.06LTS, insert the Ubuntu Server (LTS 26.04LTS Live) installation CD/USB/DVD and follow the onscreen instructions. If you don’t understand the questions asked by the installer put the keyboard down and switch everything thing off and go back to being a user.

You will be asked.

Select Language - (English UK)
Select Keyboard Layout.
Select Ubuntu Server - not the minimized version.
Check the box for Third Party Drivers (to install things like NVIDIA drivers etc)
Proxy address if you have one.
Use the entire disk for the OS when asked - it will create the relevent partitions.

Your name
Your servers name
Username of the Admin
Password (and confirmation)

Skip ubuntu pro (we can do that later)

Install the SSH server when prompted so you can get remote access.

When asked to install snaps do not select any.

When prompted choose

Use An Entire Disk

This will configure the system disk, with automatic boot / root / swap partitions. You can specify extra disks later and mount them if needed. You can also enter manual mode and select other disks and choose your mount points. You may want to set up LV volumes if you want to resize partitions later.

If you want to be safe, disconnect all disks apart from the one on which you want the do the install, (then add them later)

root@solaris:/home/sysadmin# lsblk
NAME                    MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
sda                       8:0    0   3.6T  0 disk /srv/media
sdb                       8:16   0  12.7T  0 disk
├─vg--backup-lv--cctv   252:0    0     1T  0 lvm  /srv/cctv
└─vg--backup-lv--backup 252:1    0  11.7T  0 lvm  /srv/backup
sdc                       8:32   0   3.6T  0 disk
└─vg--data-lv--data     252:2    0     3T  0 lvm  /srv/data
sr0                      11:0    1  1024M  0 rom
nvme0n1                 259:0    0 465.8G  0 disk
├─nvme0n1p1             259:1    0     1G  0 part /boot/efi
└─nvme0n1p2             259:2    0 464.7G  0 part /

You can edit the disk partitions before submitting to add further disks at specific mount points. Mount points used were.. (which in this case were manually configured as I did not want to lose existing data)

Prolong the life of SSDs with

nano /etc/sysctl.d/local.conf

And add this line

vm.swappiness=20

Make live with

  systemctl restart procps.service

When prompted create the system login user / password The server will install the basics, set up your user / timezone etc. Eventually you will be prompted to Reboot.

Reboot Now