In fact it looks like it actually works. However, I have had difficulties finding detailed docs on all of the possible tabadmin possibilities.
For example where it talks about this "tabadmin set vizqlserver.showshare false" command and other commands like "tabadmin customize logo "filename" or "tabadmin customize name "company name".
Would be good to find all these options on one same page!
Glad you got it working! And thanks for the feedback, I'll see what we can do about getting all the tabadmin options documented in one central location.