X11 forwarding comes in handy from time to time. For example, say you want to use
virt-manager to work with KVM VMs on your lab machine but want to do it from your Mac (ahem).
Yeah, if you didn’t gather it already, by “you”, I mean “me”. 😉
The one main issue with this very specific above scenario is that
virt-manager will more than likely require some sort of root-level privileges, and neither the
~/.Xauthority file, nor the
XAUTHORITY environment variables survive
The manual fix is pretty easy though. Before escalation, run
xauth list to get the session data.
The output looks like:
$ xauth list localhost.localdomain/unix:99 MIT-MAGIC-COOKIE-1 aabbccddeeffgghh00112233445566
Take the second line (which is the session data). Then, after getting root (
sudo su - works great), run
xauth add with the session data:
xauth add localhost.localdomain/unix:99 MIT-MAGIC-COOKIE-1 aabbccddeeffgghh00112233445566
This will create the
~/.Xauthority file and aforementioned environment variables.
We are now able to run X11 apps as root!
Shout out to Backdrift for the source.