Debian vs Ubuntu packages #1440
Description
Although Debian and Ubuntu use the same format for package, i.e. .deb, they use different repositories. Debian uses http://deb.debian.org/debian/ and Ubuntu uses http://archive.ubuntu.com/. And packages for one version of Ubuntu should not be installed in another version of Ubuntu.
Based on this, the section "apt.txt - Install packages with apt-get" can make some users confuse. It will be better to be more precise from where users can install software.