apt-cache
Debian and Ubuntu package query tool.
More information: https://manned.org/apt-cache.8.
- Search for a package in your current sources:
apt-cache search query
- Show information about a package:
apt-cache show package
- Show whether a package is installed and up to date:
apt-cache policy package
- Show dependencies for a package:
apt-cache depends package
- Show packages that depend on a particular package:
apt-cache rdepends package