遗憾的是，我无法使用我的 CDROM。有人能帮我吗？
/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
/dev/mapper/ubuntu--vg-swap_1 none swap sw 0 0r/180
loop6 7:6 0 3,3M 1 loop /snap/gnome-system-monitor/36
loop7 7:7 0 1,8M 1 loop /snap/quadrapassel/44
loop8 7:8 0 86,9M 1 loop /snap/core/4917
loop9 7:9 0 3,7M 1 loop /snap/gnome-system-monitor/51
loop10 7:10 0 12,2M 1 loop /snap/gnome-characters/69
loop11 7:11 0 140M 1 loop /snap/gnome-3-26-1604/59
loop12 7:12 0 34,7M 1 loop /snap/gtk-common-themes/319
loop13 7:13 0 1,6M 1 loop /snap/gnome-calculator/154
loop14 7:14 0 21M 1 loop /snap/gnome-logs/25
loop15 7:15 0 140,9M 1 loop /snap/gnome-3-26-1604/70
sda 8:0 0 465,8G 0 disk
└─sda1 8:1 0 465,8G 0 part
├─ubuntu--vg-root 253:0 0 464,8G 0 lvm /
└─ubuntu--vg-swap_1 253:1 0 976M 0 lvm [SWAP]
sr0 11:0 1 2K 0 rom