KDE Apper is a graphical package manager that uses PackageKit to install, remove, and update software supplied by a Linux distribution. First check whether your distribution still offers it: KDE now labels Apper unmaintained and says it is no longer released by the KDE community. Some archives still carry it, but availability and backend support depend on your distribution. See KDE's Apper status page before proceeding.
If Apper is missing or causes problems, use your distribution's supported software manager. KDE's current Discover can manage repository software and, when the relevant backends are installed, sources such as Flatpak and Snap.
Refresh your repository metadata with your normal system updater, then search for the exact package name apper. Availability depends on your distribution version and enabled repositories. Do not add an unofficial repository just to make an old package appear.
| Linux distribution | Check first | Install only if a package is listed |
|---|---|---|
| Ubuntu or Debian | apt-cache policy apper | sudo apt install apper |
| Fedora | dnf info apper | sudo dnf install apper |
| Arch Linux | pacman -Ss apper | If no official repository result appears, use a maintained alternative; do not assume an old community build is supported. |
| openSUSE | zypper search apper | Install only from an official repository that lists a package for your release. |
Package catalogs vary by release. Ubuntu lists Apper for selected releases, and Debian's Trixie search also shows it. Check current records for Fedora, Arch, and openSUSE. openSUSE currently lists no official Apper package for Leap 16.0 and marks Tumbleweed options experimental.
On Ubuntu or Debian, run sudo apt update, check the candidate, then run sudo apt install apper if one is available. On Fedora, use the DNF command in the table only when dnf info apper returns a package for your enabled repositories. For other distributions, use their software center if it offers Apper; if the package is not in the official repositories, stop here and choose the maintained alternative.
After installation, search the application launcher for Apper or run apper in a terminal. Do not start the graphical app with sudo; let PackageKit and the desktop authorization prompt handle each transaction.
Apper's labels vary by version, but look for a software or package search view such as Get Software or Search Packages. Enter an application's name, then read its description and package details. Search results may include libraries, language packs, and development files alongside applications, so choose the entry that matches what you need.
Cancel if the summary proposes removing unrelated software or installing packages from a source you do not recognize. Apper works with the software sources exposed by your distribution's PackageKit backend; do not expect it to manage every Flatpak, Snap, or AppImage installed on the computer.
Open Installed Software (or the equivalent list), search for the application, select it, and choose Remove. Review the proposed transaction before confirming. Apper may offer to remove packages that depend on the selected item, and the package list can include components used by Plasma or other parts of the system. If you are unsure what a dependency does, cancel and use your distribution's supported package manager or consult its package documentation.
Choose Updates and select Check for Updates if that control is available. Review the packages Apper finds, then apply the transaction and authorize it. Update names and controls depend on the distribution's PackageKit backend. For a major operating-system upgrade, use the distribution's documented upgrade process rather than treating Apper's package list as an upgrade plan.
If search results are empty, check that your network works and refresh repository metadata in your distribution's normal software manager. Then verify that Apper is still available for your release and that its PackageKit backend is installed. If a PackageKit warning appears or a transaction fails, note the full message and stop rather than repeatedly retrying with elevated privileges.
If Apper or its backend is unavailable, use your distribution's maintained software updater or package manager for installs, removals, and security updates.
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