Trying to learn how to work with packages in Ubuntu (and have Gentoo experience). This command is already known:
(1) sudo apt-get install pkgname
Looking for counterparts of these:
(2) emerge -s pkgname
(3) equery files pkgname
(4) equery belongs filename
(5) cat /var/lib/portage world
Which useful (console) package commands do you use in Ubuntu? Links to Ubuntu packages tutorial in style of Gentoo's Handbook?
This question is better suited for superuser.com or http://ubuntu.stackexchange.com/.
Anyway, I haven't used Gentoo's tools, but I think this Debian guide on package management is quite complete and you'll find the equivalents.
Some examples on apt-get:
apt-cache search package queries the repo for package.
apt-cache show package displays info on a certain package (dependencies and such).
Ubuntu Hacks/Package Management - Manage Packages From the Command Line
Debian Reference - Basic package management tools: apt-get / apt-cache and aptitude.