"Add repositories from a CD or DVD If you need an
offline repository for packages, you can download all the ISO
images for your distribution, eventually burn them on CDs/DVDs and
add them manually to the /etc/apt/sources.list file using apt-cdrom
"Enter the CD/DVD in the drive and let APT scan for
"Another great solution is to not even burn the ISO images to
CD, just mount them and add them to your sources.list this way.
Here's what you have to do: First, type:
apt-cdrom -d=/cdrom add
"Or replace /cdrom with some empty directory of your choice"