apt-cache
Table of Contents
1. Sources priorities
Print the priorities of each source and their origin
apt-cache policy
2. Print PACKAGE available versions and source priorities
apt-cache policy PACKAGE
3. Show PACKAGE version control URL
apt-cache showrc PACKAGE
4. Dependencies
4.1. List each dependencies for PACKAGE
apt-cache depends [--installed] PACKAGE
4.2. List each reverse dependencies for PACKAGE
apt-cache rdepends [--installed] PACKAGE
5. List available sections
apt-cache dumpavail | grep '^Section:' | sort -u