Server: Ubuntu sets IP address, gateway, DNS
Server 1. Set IP address, gateway
Nano / etc/network/interfaces / etc/network/interfacesbak # back up the original configuration file
Nano / etc/network/interfaces # Editing the Nic configuration file
Auto lo
Iface lo inet loopback
Auto eth0 # automatically connect to the network when booting
Iface eth0 inet static # static means to use a fixed ip,dhcp expression to use dynamic ip
Address 192.168.21.168 # set ip address
Netmask 255.255.255.0 # set subnet mask
Gateway 192.168.21.2 # set Gateway
Ctrl+o # Save configuration
Ctrl+x # exit
2. Set dns
Cp / etc/resolv.conf / etc/resolv.confbak # back up the original dns configuration file
Nano / etc/resolv.conf # edits the configuration file to add the following
Nameserver 8.8.8.8 # set preferred dns
Nameserver 8.8.4.4 # set up standby dns
Ctrl+o # Save configuration
Ctrl+x # exit
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3. Restart the network
/ etc/init.d/networking restart # restart the network
