How to Set a Static IP in Linux

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The following will work for any debian base linux distro. That includes Ubuntu, Kali, Raspberry Pi (Raspian Jessie), TAILS, and many more.

Edit Interface Settings

Edit the config:

sudo vi /etc/network/interfaces

Find the interface you wish to make static and add the following lines:

auto eth0
iface eth0 inet static
        address 192.168.1.100
        network 192.168.1.0
        netmask 255.255.255.0
        broadcast 192.168.1.255
        gateway 192.168.1.1
  • address is the IP you want to assign this host
  • network is the network portion of this subnet. It’s usually the same as your static IP but ending in .0
  • netmask is the netmask of your subnet. This is usually 255.255.255.255
  • broadcast is the broadcast IP of this subnet. It’s usually the same as your static IP but ending in .255
  • gateway is the next hop for this system to go. This is usually a router’s IP and it must be in the same subnet as the host address.

Configure DNS

To resolve hostnames to IP addresses you must configure a DNS server. You can do this by editing the following:

vi /etc/resolv.conf

Add your DNS servers to this file or use Google’s public DNS servers like this:

nameserver 4.2.2.2
nameserver 4.2.2.3

Restart networking

To make these change effective you must restart the networking service. That can be done by doing one of the following:

sudo /etc/init.d/networking restart

If that doesn’t work try:

sudo /etc/init.d/networking reload

If that doesn’t work try:

sudo systemctl restart [email protected]

Check settings

Now check if the settings took by running the following command:

ifconfig

The output looks like this:

eth0      Link encap:Ethernet  HWaddr d8:eb:97:bd:53:4e
          inet addr:192.168.1.100  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::daeb:97ff:febd:534e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:47436 errors:0 dropped:3117 overruns:0 frame:0
          TX packets:13017 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:5982679 (5.7 MiB)  TX bytes:1837349 (1.7 MiB)

linux, misc

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