Set IP address, Gateway, DNS in Debian

1. Set IP address, gateway

Cp/etc/network/interfaces/etc/network/interfaces.bak # Backing up legacy configuration Files

Vi/etc/network/interfaces # Edit Network adapter profile

# The Loopback network interface
Auto Lo
Iface Lo inet Loopback

# The Primary network interface
Auto eth0 # Auto Connect network
Allow-hotplug eth0
Iface eth0 inet Static # static means using dynamic IP with fixed ip,dhcp representations
Address 192.168.21.166 # set IP address
netmask 255.255.255.0 # Set Subnet mask
Gateway 192.168.21.2 # Setting up gateways

Press the ESC key, and then enter: EQ to save and exit.

The following version is easy to copy because it is best not to have Chinese in the configuration file:

# The Loopback network interface
Auto Lo
Iface Lo inet Loopback

# The Primary network interface
Auto Eth0
Allow-hotplug eth0
Iface eth0 inet Static
Address 192.168.21.166
Netmask 255.255.255.0
Gateway 192.168.21.1

2. Set up DNS

Cp/etc/resolv.conf/etc/resolv.conf.bak # Backing up the original DNS configuration file

Vi/etc/resolv.conf # Edit configuration file

NameServer 127.0.0.1
NameServer 8.8.8.8 # Setting Preferred DNS
NameServer 8.8.4.4 # Setting up alternate DNS

Press the ESC key, and then enter: EQ to save and exit.

The following version is easy to copy because it is best not to have Chinese in the configuration file:

NameServer 127.0.0.1
NameServer 8.8.8.8
NameServer 8.8.4.4

3. Restart the network

Service Networking Restart # Restart Network

At this point, the IP address, gateway, DNS configuration is complete, now the system is ready to go online.

Set IP address, Gateway, DNS in Debian