As I understand it, it seems to be trying to install the package from the InstallationCD and failing for some reason (MD5 mismatch of the package!). Shouldn't normally happen if you are using the same version of CD that you installed from. But there is a possibility of the CD being corrupted.
Possible remedy would be - 1. Edit /etc/apt/sources.list file and comment out lines that refer to the Installation CD as a source of packages. Also check to see if there are any Internet sources listed in the file. There should be some. 2. Refresh the package database - sudo apt-get update 3. Then try installing the package - sudo apt-get install gcc g++ You need to be connected to the Internet to install packages this way. It might ask you for a Y/N questions to get packages from the Internet. Go ahead and say Y! -- Navneet Thillaisthanam Room No: 1024, Highfield Court, Royal Holloway University of London, Egham, Surrey, TW20 0TB United Kingdom. Mobile: +44-777-499-0752 There are 10 types of people in this world. One who can't understand binary numbers and the other who can understand them very well!
