The output of your command "cat /etc/fstab" is:

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
#                
# / was on /dev/ubuntu-vg/ubuntu-lv during curtin installation
/dev/disk/by-id/dm-uuid-LVM-bwJi9bdfLCflhqehz6qXdUL59JR24Xf0rHdvjhk8ZpXoT68rePQS6AbUBUFiMMj0 / ext4 defaults 0 1
# /boot was on /dev/sda2 during curtin installation
/dev/disk/by-uuid/95a0d322-a759-4561-b5b8-e1aca5462947 /boot ext4 defaults 0 1
/swap.img	none	swap	sw	0	0