OK, for anyone on Ubuntu 20.04, the following worked for me.
- Download oracle 8 jdk manually (see above posts) and install it, make sure it's set as your default. Also, since we're not using PPA, make sure to install all dependencies (rsu client tells you what they are when you launch the installer).
- The rsu client was having issues with xdg-open, so first try this (correct for your runescape directory). This makes xdg runnable and can be found in the rsu client (runescape/templates/protocol/install-jagex-protocol-linux) :
Code:sudo chmod +x /runescape/templates/packaging/usr/local/bin/xdg-open
- For some reason, rsu was not able to download the jagexappletviewer.jar (possibly due to firewall). To fix this, download the OldSchool.msi client (from the oldschool website). The, extract it using:
After that, move the jagexappletviewer.jar (fromthe extracted folder), and put it in /runescape/bin/.Code:msiextract OldSchool.msi
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