
How do I stop getting "Access Denied" messages when I try to change anything? I have been attempting to change my wallpaper by pasting a jpeg file into /usr/share/wallpapers/. I keep getting "Access Denied, can not write to directory." I tried signing in as root, changing to security level 1, changing permissions. Result: OS crashed, I have to do another complete re-install. I had a similar problem when I was trying to add a new printer driver. Any suggestions?