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.