How to install packages from server CD after installing the system

Solution 1:

Follow the step-by-step approach described in the link. You should be able to do it. https://help.ubuntu.com/community/Repositories/Ubuntu

Regarding the mounting related query

When you mount a disc normally with the file browser (nautilus etc) it mounts disks by interacting with udisks behind the scenes. You can do the same thing on the command line with the udisks tool. eg /usr/bin/udisks --mount /dev/sdb1 The bit after --mount is the device name of the partition you want to mount. (/dev/something)

Alternately try mounting the CD using the mount command.You can check the MAN page for "mount" if you are new to mount command.