In Linux family operating system CentOS, RedHat, SuSe, Debian, Gentoo, Slackware, Ubuntu and etc. most of every operating system network configuration path is difference. The following information shows network configuration, hostname and default gateway location.

RedHat : 

       Network Interface location  /etc/sysconfig/network-scripts/ifcfg-*

        Hostname and default gateway location /etc/sysconfig/network

        Location of static routes /etc/sysconfig/static-routes 

CentOS : 

       Network Interface location  /etc/sysconfig/network-scripts/ifcfg-*

        Hostname and default gateway location /etc/sysconfig/network
    
    Location of static routes /etc/sysconfig/network-scripts/route-interface

Ubuntu :

    Network Interface location /etc/NetworkManager/system-connections/*

Debian

        Interface and route location /etc/network/interfaces 

 Gentoo

        Interface and route location /etc/conf.d/net 

 
SuSe - version >= 8.0

        Interface location /etc/sysconfig/network/ifcfg-*

        Static route location /etc/sysconfig/network/routes

        Interface specific static route location /etc/sysconfig/network/ifroute-* 

SuSe version <= 8.0 

        Interface and route location   /etc/rc.config 


Slackware

        Interface and route location   /etc/rc.d/rc.inet1