equery
View information about Portage packages.
More information: https://wiki.gentoo.org/wiki/Equery.
- List all installed packages:
equery list '*'
- Search for installed packages in the Portage tree and in overlays:
equery list -po package1 package2 ...
- List all packages that depend on a given package:
equery depends package
- List all packages that a given package depends on:
equery depgraph package
- List all files installed by a package:
equery files --tree package