LINUX > NET > Set an static IP

Set an static IP to the interface you want (eth0 for wired and wlan0 for wireless usually)

1 - Edit the configuration file for the desired network:

$ sudo nano /etc/network/interfaces.d/eth0

$ iface eth0 inet static
        address 10.1.1.125
        netmask 255.0.0.0
        gateway 10.1.1.1

2 - After commiting changes to a network interface such as set static ip's, there would be need of reset the network interfaces.
For this, two methods can be used to bring interfaces up or down:

• Restarting services
  service networking restart

• Set interfaces Up/Down
  # ip link set dev eth0 up
  # ip link set dev eth0 down