Linux Network Settings

IP Configuration

Clear the configuration file.

sudo cat /dev/null > /etc/network/interfaces

Edit configuration file with appropriate settings.

Restart networking service.

sudo service networking restart

Static IP

auto lo eth0
iface lo inet loopback
iface eth0 inet static
    address 192.168.0.2
    netmask 255.255.255.0
    network 192.168.0.0
    broadcast 192.168.0.255
    gateway 192.168.0.1
    dns-nameservers 8.8.8.8

Dynamic IP

auto lo eth0
iface lo inet loopback
iface eth0 inet dhcp

VLAN Configuration

sudo apt-get install -y vlan

auto lo eth0.10 eth0.20
iface lo inet loopback
iface eth0.10 inet static
    address 192.168.0.2
    netmask 255.255.255.0
    network 192.168.0.0
    broadcast 192.168.0.255
    gateway 192.168.0.1
    dns-nameservers 8.8.8.8
iface eth0.20 inet static
    address 192.168.1.2
    netmask 255.255.255.0
    network 192.168.1.0
    broadcast 192.168.1.255