apt-get notes

List all installed packages:
dpkg-query -l
dpkg --get-selections
apt list --installed

List all packages that are available for install from sources in /etc/apt/sources.list
apt-get update
apt-cache dumpavail

To find out what package contains a file:
dpkg-query -S libf2c.so.2.1

List all files owned by a package
dpkg -L package-name

Reinstall a package
sudo apt-get install --reinstall package-name

What does a package depend on?
apt-cache depends package-name

What depends on this package?
apt-cache rdepends package-name

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