Oups, my fault (again):
With TikiWiki 2's directory, tried to run the chown +x setup.sh - no luck there either here is a partial log:
-bash-3.1$ cd pages
-bash-3.1$ cd wiki
-bash-3.1$ chown +x setup.sh
It's not "chown +x setup.sh" but "chmod +x setup.sh" (or "chmod +x ./setup.sh")
For all the rest of your comments: my pleasure, and again, welcome to Tiki Community.
I've been also helped by many other people beforehand... A pity I cannot spend more time in the forums... (or in doc.tw.o)