Generating ifcfg-eth0 from scratch

[Alex]

Hi,
What is the program that is responsible for creating
/etc/sysconfig/network-scripts/ifcfg-eth0? I am aware of
system-config-network*, however, it will not create that program from
scratch. If that file was deleted, or needed to be recreated for any
reason, how would this be done?

I understand the format, and could create it if necessary, but I'm
specifically interested in knowing how it determines the UUID field?
Is that calculated from lspci in some way perhaps?

I'm not using NetworkManager, and only have a "minimal" system
installed, so no graphical config tools either.

Any suggestions greatly appreciated.
Thanks,
Alex