There are errors in he php paths and also percona commands. I have attached the correct script with the changes.

Also this is where it gets stuck and doesn't move anyfurther
estarting Nginx, PHP-FPM and MySQL.
Done.
Using custom nginx default site settings.
cat: tmp/default.nginx: No such file or directory
Saving default my.cnf as /etc/mysql/my.bak
Using custom my.cnf as temporary solution.
You should optimize the my.cnf later from percona.com's wizard or using Major Hayden's Script.
You will not see Error Connecting Database Error with our my.cnf
Restarting Nginx, PHP-FPM and MySQL.

Apart from that its an awesome script and hopefully someone can fix the freezing error above
main.sh.zip

hello
there is an "fi" which seems useless in line 121.
I'm not very sure. but an error occur when i execute it
please check it.