root@Debian-1205-bookworm-amd64-base ~ # cd /;
root@Debian-1205-bookworm-amd64-base / # umount /dev/sdb*;
umount: /dev/sdb: not mounted.
root@Debian-1205-bookworm-amd64-base / # apt install -y parted;
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package parted is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'parted' has no installation candidate
root@Debian-1205-bookworm-amd64-base / # parted /dev/sdb -s mklabel gpt;
-bash: parted: command not found