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Linux network configuration files 

woolf
Joined:
01/15/2009
Posts:
82

May 15, 2011 14:18:54    Last update: May 15, 2011 14:19:49
  1. /etc/resolve.conf: DNS server configuration.

    Example: 
    search localdomain
nameserver 192.168.183.2

  2. /etc/hosts: map hostname to IP address locally instead of using DNS, often take precedence over DNS.

    Example: 
    127.0.0.1	localhost
127.0.1.1	myserver

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

  3. /etc/nsswitch.conf: system databases and Name Service Switch configuration file.

    Example: 
    # /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd:         compat
group:          compat
shadow:         compat

hosts:          files mdns4_minimal [NOTFOUND=return] dns mdns4
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis

  4. /etc/sysconfig/network (for Fedora, Redhat, CentOS): specify network configuration - static IP, DHCP, NIS, etc.
  5. /etc/network/interfaces (for Ubuntu): specify network configuration - static IP, DHCP, NIS, etc.

    Example: 
    auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

auto eth1
iface eth1 inet static
address 192.168.183.5
netmask 255.255.255.0
gateway 192.168.183.2


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