Unable to install and and enable guest additions


I’m getting this error. I tried restarting my computer and no go, any ideas?


Nevermind, I think VBoxGuestAdditions.iso was automatically mounted, the file was found on my desktop (VBox_GAs_6.0.14). I opened it and opened the terminal from there. Can someone confirm this is the correct way?

On another note, is there a way to delete forum posts?