Install software from ISO via apt

• Mount ISO file at /media/cdrom as as iso9660 file system

sudo mount -t iso9660 -o loop PATH/TO/ISO /media/cdrom

• Configure apt source list to point to /media/cdrom

# /etc/apt/sources.list

deb [trusted=yes] file:/media/cdrom bullseye main non-free contrib

• Update repositories

sudo apt update
sudo apt install <software>

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