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bat is a GUI tool so needs to run under X. Running X as root is considered insecure or dangerous.
Many distros have package-manager GUIs that need to be run with root privileges. There do not seem to be any problems. The 'buntu's have synaptic (gnome) and adept (KDE) as well as the command-line apt-get, aptitude etc.
There is a difference between "Running X as root" and running an application as root, on X.
Regards su and sudo, my su root bat was never going to work. Experimenting shows only sudo does work:
c@CW8:~$ su root -c bat
No protocol specified
bat: cannot connect to X server :0.0
c@CW8:~$ su -
bat: cannot connect to X server
c@CW8:~$ sudo bat
[bat ran OK]
Originally Posted by tredegar
Your solution with the group bacula, looks fine, but I do not think it is necessary.