Ubuntu 20.04 LTS
About Install
EFI / UEFI vs BIOS
ESP
EFI System Partation
fdisk -l /dev/sdb
Check your storage devices
resolve.conf
kasumi@kasumi-PC:~$ ls -lih /etc/resolv.conf
1048783 lrwxrwxrwx 1 root root 39 1月 22 20:39 /etc/resolv.conf -> ../run/systemd/resolve/stub-resolv.conf