thank you very much for your quick'n'neat answer, it worth being added to the wiki. Do you mind if I do so?
(by the way I was a little confused on the wiki page because it was talking about 'tce' extension not 'tcz').
One more question:
Can we add a startup script?
thnx
this is open project so anyone can contribute as long as you strict with community conventions and rules
yes there is tce.installed script that is run just after the extension is loaded
put your commands to
myext/usr/local/tce.installed/myext (script name must be the same with extension name)
then adjust permissions of both tce.installed directory and tce.installed script to 775 and ownership to root.staff
sudo chmod -R 775 myext/usr/local/tce.installed
sudo chown -R root.staff myext/usr/local/tce.installed
you can find most of the information in the related wiki page already