System preparation
$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=24.04
DISTRIB_CODENAME=noble
DISTRIB_DESCRIPTION="Ubuntu 24.04.2 LTS"
Updrage
sudo apt update
sudo apt upgrade
do-release-upgrade
(Optional) Mount data disk
mkfs.xfs /dev/vdb
lsof /var
mv /var/ /var0
mkdir /mnt/newvar/
mount /dev/vdb /mnt/newvar/
rsync -aqxP /var0/* /mnt/newvar/
umount /mnt/newvar
mkdir /var
mount /dev/vdb /var
vim /etc/fstab
# /dev/vdb /var xfs defaults 0 0