/etc/hostname
/etc/hosts
/etc/resolv.conf
/etc/nsswitch.conf
Red Hat Network Files
/etc/sysconfig/network-script/ifcfg.eth0
/etc/sysconfig/network
Debian/Ubuntu
/etc/network/interfaces
CentOS
/etc/sysconfig/network-scripts/
cat ifcfg-eth0
cat /etc/sysconfig/network
/etc/resolv.conf