Yoshikoder won’t start on Ubuntu

Two days ago my Yoshikoder refused to start on the Ubuntu (GNU/Linux) machine. So I tried in the console java -jar Yoshikoder-0.6.4.jar and was informed that “Error: Assistive Technology not found: org.GNOME.Accessibility.AtkWrapper”. A quick on the web look turned out that the solution is simple. In the console, I opened the following file:

sudo leafpad /etc/java-11-openjdk/accessibility.properties

and commented out the line causing problems (in my case it was the last line), so that it reads:

#assistive_technologies=org.GNOME.Accessibility.AtkWrapper

Sorted.

Zotero on Ubuntu Does Not Update: How to Fix the Permissions

My Zotero did not update, showing a dialog that while there is an update available, I apparently lacked the permissions to update. First I tried to chmod the directory where I extracted Zotero to, and the Zotero binary, but that did not change the error message. It turns out there is another directory that needs to be changed:

sudo chmod 707 /usr/bin/zotero && sudo chmod -R 707 /opt/zotero

(in the terminal) and now everything works as it should.

Update 10 April 2019: see comments for a more appropriate handling of the permissions.