man(1) man page — Describes man pages and how to find them.
NetworkManager(8) man page — Describes the network management daemon.
NetworkManager.conf(5) man page — Describes the NetworkManager configuration file.
/usr/share/doc/initscripts-version/sysconfig.txt — Describes ifcfg configuration files and their directives as understood by the legacy network service.
/usr/share/doc/initscripts-version/examples/networking/ — A directory containing example configuration files.
ifcfg(8) man page — Describes briefly the ifcfg command.