When Kubuntu needs to be upgraded between versions (e.g. 9.10 to 10.04), there's a notifier icon that shows up in the system tray,

upgrade icon


But if I click on it to start the upgrade and it fails for some reason (in my case, not enough space on the /boot partition), the icon disappears. How can I either get it back, or run the upgrade manually, without having to log out and log back in?


Open up KPackageKit in Kickoff (under the Computer tab), and it should offer to install updates.

If KPK can't do it:

sudo do-release-upgrade
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  • Hm, I thought I did that and it only gave me 4 updates, the regular security/bugfix complement... but I'll go back and try it again to check. – David Z Aug 16 '10 at 0:41

The program that places the icon in the tray is a python script, update-notifier-kde, and it can be run from the terminal as

python /usr/bin/update-notifier-kde

(sudo not required, it will prompt for the password graphically)

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