lsbk -f 的输出
NAME FSTYPE LABEL UUID MOUNTPOINT
loop0 squashfs /snap/gnome-3-28-1804/47
loop1 squashfs /snap/gnome-calculator/406
loop2 squashfs /snap/gnome-characters/139
loop3 squashfs /snap/gtk-common-themes/1198
loop4 squashfs /snap/gnome-logs/45
loop5 squashfs /snap/gnome-system-monitor/57
loop6 squashfs /snap/gnome-characters/272
loop7 squashfs /snap/core/6964
loop8 squashfs /snap/core/6350
loop9 squashfs /snap/core18/970
loop10 squashfs /snap/gnome-system-monitor/81
loop11 squashfs /snap/gnome-calculator/260
loop12 squashfs /snap/gnome-logs/61
loop13 squashfs /snap/gtk-common-themes/818
loop14 squashfs /snap/vlc/770
loop15
sda
├─sda1 vfat 5DC3-6837 /boot/efi
├─sda2 ext4 221d0605-673f-4f51-ab00-07b418d864b5 /boot
└─sda3 crypto_LUKS d35532b2-9210-4b59-b924-39b4fb8b93e8
└─sda3_crypt LVM2_member n24ztS-ci1Y-MeOh-6d2F-B731-Ym5n-ArDnee
├─ubuntu--vg-root ext4 8edfdfac-c9a2-45d8-939d-7024d7747c23 /
└─ubuntu--vg-swap_1 swap a8c5d6f0-8f11-4a2f-b47b-453ff9421923 [SWAP]
fstab 的输出（以 root 身份）
# /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>
/dev/mapper/ubuntu--vg-root / ext4 errors=remount-ro 0 1
# /boot was on /dev/sda2 during installation
UUID=221d0605-673f-4f51-ab00-07b418d864b5 /boot ext4 defaults 0 2
# /boot/efi was on /dev/sda1 during installation
UUID=5DC3-6837 /boot/efi vfat umask=0077 0 1
/dev/mapper/ubuntu--vg-swap_1 none swap sw 0 0