Network configuration files

/etc : This directory contains most of the basic Linux system-configuration Files

/etc/sysconfig : Contains important system configuration files that are created and maintained by various services (including iptables, samba, and most networking services)


/etc/sysconfig/network : Network configuration file used by the system during the boot process.


/etc/sysconfig/network-scripts :Configuration files that are run during boot process related to setting up of your network.

/etc/xinetd.d : Contains a set of files, each of which defines a network service that the xinetd daemon listens for on a particular port.

/etc/resolv.conf : Host name resolver configuration file. This configures Linux so that it knows which DNS server will be resolving domain names into IP addresses.



/etc/hosts : Locally resolve node names to IP addresses. This informs Linux of local systems on the network which are not handled by the DNS server.

/etc/nsswitch.conf: System Databases and Name Service Switch configuration file. Looks up /etc/hosts first, if host not found then it would query DNS server as defined by
 /etc/resolv.conf

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