Keep the System Up to Date

There are two methods of keeping a KDE Linux system up to date: graphical, and using command-line tools.

Graphical

Updates are done through the Discover software center app. Discover handles both system updates as well as updates for Flatpak-based apps and add-on content.

Discover will notify you when updates are available; just click the notification to launch Discover and see what’s available. On Discover’s Updates page, click “Update All” when you’re ready to update.

Updates to apps take effect the next time the updated apps are launched, while system updates take effect the next time the machine is restarted.

Command-line

Alternatively, you can update the system using command-line tools in a terminal.

Check for system updates using updatectl check, and install the latest one with updatectl update. Restart the system to apply the update.

If greater verbosity is needed, use run0 /usr/lib/systemd/systemd-sysupdate update instead.

Check for Flatpak updates and interactively decide to install them or not using flatpak update.

Troubleshooting & known issues

If updates fail between 30% and 40% with “Input/output error”, wait an hour or two and try again. This is likely to be a known issue related to updates being advertised as available before all update servers have fully synced.

Article contributed by under the CC-BY-4.0 license.