See also: Software

Cannot make directory '/var/run/screen': Permission denied

This issue has been documented here. In short, /etc/rcS.d/S70screen-cleanup is running via upstart much earlier than it expects to have run, and is failing to correctly clean up that directory.

It can be fixed with the following command

sudo /etc/init.d/screen-cleanup start

–Huey

https://superuser.com/questions/1195962/cannot-make-directory-var-run-screen-permission-denied