Link to the ext article
Below I used "alexey" as my user name, change it.
1. download iso dvd
Download iso from page http://cdimage.ubuntu.com/releases/7.10/release/ (by torrent or direct download) to
/home/alexey/images/ubuntu-7.10-dvd-i386.iso
2. mount iso
sudo mkdir /media/ubuntu710dvd
sudo gedit /etc/fstab
"/home/alexey/images/ubuntu-7.10-dvd-i386.iso /media/ubuntu710dvd iso9660 ro,loop,auto"
sudo mount -a
3. configure software sources
sudo gedit /etc/apt/sources.list
"deb file:/media/ubuntu710dvd/ gutsy main restricted"
4. update
sudo apt-get update
