On Thu 15 Jul 2021 at 11:43:26 (+0200), Stella Ashburne wrote: > Debian Bullseye's installer is on a USB stick and I used it to boot into > Rescue Mode. If it's of any relevance, the partition table type is GPT, with > UEFI+Secure Boot enabled. > > After booting into Rescue Mode and filling out the required details onscreen, > I chose /dev/perfect-vg/root as the device to use as root file system. If you > may recall, the volume group perfect-vg is LUKS-encrypted. > > When asked if I wanted to mount the separate /boot/efi partition, I entered > No. > > Next, I entered Executive a shell in /dev/perfect-vg/root > > I typed the command nano /etc/apt/sources.list and commented out all the > lines therein. > > I added the the following line: > > deb [trusted=yes] file:/media/myusb bullseye main > > I saved the sources.list file. > > I created a directory called /media/myusb and issued the following command to > mount the USB stick to it: > > mount /dev/sdb1 /media/myusb
Presumably given as root. > The error message is: > > mount: /media/myusb: /dev/sdb1 already mounted or mount point busy Type: $ ls -l /dev/disk/by-label/ to see what the kernel called your stick. Debian installers have LABELs. > Below are the results of cat /etc/fstab > > <file system> <mount point> <type> <options> <dump> > <pass> > /dev/mapper/perfect--vg-root / ext4 errors-remount-ro 0 > 1 > /boot/efi was on /dev/sda1 during installation There's a # before that line > UUID=A30E-2C33 /boot/efi vfat umask=0077 0 1 > /dev/mapper/perfect--vg-swap none swap sw 0 0 > /dev/sr0 /media/cdrom0 udf, iso9660 user, noauto 0 0 > /media/myusb That line looks spurious. If you put it there, I would remove it for the time being. When you mount a USB stick as root, you don't need an entry in fstab, but you do need to create a mount point first. Of course, this has been done for you as a convenience: there is a /mnt directory specifically for temporarily mounting a device. Cheers, David.
