Plex Media Scanner is UID sensitive.
It must be invoked as user plex
There are two libraries on this test server.
[chuck@lizum ~.68]$ su - plex
Password:
-sh-4.4$ export LD_LIBRARY_PATH=/usr/lib/plexmediaserver
-sh-4.4$ export PLEX_MEDIA_SERVER_APPLICATION_SUPPORT_DIR="/var/lib/plexmediaserver/Library/Application Support"
-sh-4.4$ cd /usr/lib/plexmediaserver
-sh-4.4$ ./Plex\ Media\ Scanner --list
2: TV
1: Movies
-sh-4.4$
