I tried this and it worked: Problems Encountered And Their Solution
If while downloading the packages, tasksel unexpectedly exits with an error – tasksel: aptitude failed (100), do not despair. It is because the package database of your Ubuntu installation is old. Doing a sudo apt-get update will resolve the error and tasksel will be able to continue where it left off. Ref: http://linuxandfriends.com/2009/12/09/how-to-install-lamp-server- in-ubuntu-linux/. -- When attempting to install lamp-server, returns "aptitude failed (100)" https://bugs.launchpad.net/bugs/131134 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs