Lesson 4

Dates: 2/12/2014
Linux networking
Linux for Engineering and IT Applications


Configuring Linux on a network


  • Configuring the network interface and routing by
    using commands /sbin/ifconfig and /sbin/route

    Check the interface configuration: 
    /sbin/ifconfig
    Check the routing configuration: 
    /sbin/route -n
    or 
    netstat -nr

    Stop the interface: 
    /sbin/ifconfig eth0 down
    or 
    /sbin/ifdown eth0

    Configure the interface: 
    /sbin/ifconfig eth0 192.168.5.18 netmask 255.255.255.0 up
    Configure the routing to the gateway: 
    /sbin/route add default gw 192.168.5.240 eth0

  • Configuring the network interface and routing by using the startup scripts.

    Static IP address configuration on Ubuntu in /etc/network/interfaces 
    auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
address 192.168.5.18
netmask 255.255.255.0
gateway 192.168.5.240

    Dynamic (DHCP) configuration on Ubuntu: 
    auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

    For the name resolution, configure /etc/hosts, /etc/resolv.conf, /etc/nsswitch.conf

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