Static IP address

There are various reasons why you may wish to assign static IP addresses on your network. For instance, one may gain a certain degree of predictability with unchanging addresses, or you may not have a DHCP server available.

A static address can be configured with most networking tools standard in Arch Linux, for example see netctl, systemd-networkd, dhcpcd.

The following describes how to configure a static IP address manually. You need:

• Static IP address
• Subnet mask in CIDR notation, for example /24 is the CIDR notation of 255.255.255.0 netmask.
• Broadcast address
• Gateway‘s IP address
• Name server (DNS) IP addresses. See also resolv.conf.

If you are running a private network, it is safe to use IP addresses in 192.168.*.* for your IP addresses, with a subnet mask of 255.255.255.0 and a broadcast address of 192.168.*.255. The gateway is usually 192.168.*.1 or 192.168.*.254.

iface eth0 inet static
address 192.168.1.16
netmask 255.255.255.0
gateway 192.168.1.1

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Above is not for debian.

Important!

Everything is in file:  /etc/network/interfaces

Never put more than one gateway!!