Docu review done: Tue 17 Oct 2023 10:53:15 AM CEST

apt

Table of Content

Commands	Descriptions
`apt install [packagename]=[versoin]`	installs package in given version
`apt download [packagename]`	downloads only the deb file
`apt changelog [packagename]`	shows changelog for package
`apt --with-new-pkgs upgrade [packagenames]`	upgrade held back packages by installing new dependencies

Commands	Descriptions
`apt-cache showpkg [packagename]`	shows dependencies in details
`apt-cache stats`	shows local cache information
`apt-cache policy`	lists repositories and there priorities as well as pined packages
`apt-cache policy [packagename]`	shows priorities for given package only (for all package versions)
`apt-cache rdepends [packagename]`	lists reverse dependencies for package
`apt-cache rdepends [packagename] --installed`	same as above + only installed packages
`apt-cache rdepends [packagename] --installed --no-recommends --no-suggests`	same as above + no recommends and no suggests

Commands	Descriptions
`apt-get check [packagename]`	generates dependency tree, shows broken dependencies
`apt-get --no-install-recommends [packagename]`	Does not treat recommended packages for installation
`apt-get --install-suggests [packagename]`	Treats suggested packages as dependencies

Commands	Descriptions
`hold [packagename]`	holds package to current installed version
`unhold [packagename]`	removes hold on package
`showhold`	lists all packages with have the hold mark set

Commands	Descriptions
`apt-key`	interact with gpg keys
`apt-key export <keyid>` \| `gpg --dearmour -o /etc/apt/trusted.gpg.d/<name of project/tyeam/...>.gpg`	Exports and creates `.gpg` file for keys stored in `trusted.db`

Commands	Descriptions
`apt-show-versions`	parses the dpkg status file and the APT lists for the installed and available package versions and distribution and shows upgrade options within the specific distribution of the selected package
`apt-show-versions [-i	–initialize]`
`apt-show-versions [-u	–upgradable]`
`apt-show-versions [-p	–package] [package-name] [-a
`apt-show-versions [-r	–regex] [regex]`
`apt-show-versions [-R	–regex-all] [regex]`

To disable recommendations (not recommended) you can add the following line to your apt config:

APT::Install-Recommends "false";

To disable suggestions (might consider it, but think about it first) you can add the following line to your apt config:

APT::Install-Suggests "false";

If you do not want to get packages all the time autoremoved (without your interaction) you can use this config lines inside your apt.conf:

APT::Get::AutomaticRemove "0";
APT::Get::HideAutoRemove "1";

This will disable the autoremove and hides it also from your apt execution.

Keep in mind, that you have to take care of that then on your own! To keep your system clean and small

Directory	Description
`/var/cache/apt`	package cache
`/var/lib/apt/lists`	contains (In)Release/Package from all apt sources

Commands	Descriptions
`ar vr [file.deb]`	Extracts content of Debian package