I did that on the script I have, it appears that all worked well until I got snagged at PHP, So I uncommented php7 and php and commented the one that was there. It worked. Thank you for your help.

This is Debian 9.5 on amazon light sail. Also, I looked over the script, I found that one of the initial apt-get install lines does include chkconfig

Looks like it is a dependency issue Selecting previously unselected package libusb-1.0-0:amd64. (Reading database ... 64167 files and directories currently installed.) Preparing to unpack .../libusb-1

I have attempted to do an install with Debian 8 9 and 10, 9 and 10 continue to have the above error message when attempting to run the DV Switch system builder. Can you please advise? Thank you, Ken K