fry@fry:~$ cat /etc/fstab                   # /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).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/ubuntu-vg/ubuntu-lv during curtin installation
/dev/disk/by-id/dm-uuid-LVM-Psz7VmJ3yUFu9AIV35DrngNxRdfeeTIFILHbk3ZdPCj95uOP33GWA7UPaOwuZeOh / ext4 defaults 0 1
# /boot was on /dev/sda2 during curtin installation
/dev/disk/by-uuid/4b18d1cb-21f5-4287-aa7c-0e3a54c1243e /boot ext4 defaults 0 1
/mnt/sda4/etc/swapfile  none    swap    sw 00


#/dev/sda4 (/mnt/sda4/etc/)

UUID=b3c7cf4d-d573-406b-8fde-62cecc46a4b3  /mnt/sda4/       ext4    defaults        0  0



UUID=b3c7cf4d-d573-406b-8fde-62cecc46a4b3 /usr               ext4    errors=remount-ro 0       1