What is PackageKit?
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PackageKit is a system designed to make installing and updating software on your computer easier. The primary design goal is to unify all the software graphical tools used in different distributions, and use some of the latest technology like PolicyKit to make the process suck less.
The actual nuts-and-bolts distro tool (yum, apt, conary, etc) is used by PackageKit using compiled and scripted helpers. PackageKit isn't meant to replace these tools, instead providing a common set of abstractions that can be used by standard GUI and text mode package managers.
PackageKit itself is a system activated daemon called
Being system activated means that it's only being run when the user is
using a text mode or graphical tool, and quits when it's no longer being
This means we don't delay the boot sequence or session startup and don't
consume memory when not being used.
gnome-packagekit is the name of the collection of graphical
tools for PackageKit to be used in the GNOME desktop.
Apper is the name of the KDE graphical tools designed for PackageKit.
By default, PackageKit uses PolicyKit for user authentication. This means that you, as an admin, can specify with fine-grained control what your users can and cannot do.
For instance, an admin could specify that unprivileged users can update the
system and do searching, but are not allowed to install or remove packages.
For home users it's typical to ask the user for their own, or the
Use cases for PackageKit exist for the following scenarios:
More details can be found on the wiki.
PackageKit and gnome-packagekit are GPLv2+ licensed. This means that you can redistribute and/or modify PackageKit and gnome-packagekit under the terms of the GNU General Public License as published by the Free Software foundation; either version 2 of the License, or (at your option) any later version. See the license information included with the software for more details.
What PackageKit is not:
Formally, PackageKit is a D-Bus abstraction layer that allows the session user to manage packages in a secure way using a cross-distro, cross-architecture API.
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