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when i was installing Ubuntu 14.04 Server Install Image, i got a DHCP error. I said continue without configuring DHCP. I completed my installation and the server is up and running.

The server is physically connected to the network. Now what should i do to access internet from the server.

I am a beginner. It will be great if someone can take me to the right step by step process to setup the network on the server.

  • Do you have a DHCP server running on your network? – muru Oct 15 '14 at 23:23
  • Typically consumer grade routers and wireless access points are running DHCP servers. – David Foerster Oct 16 '14 at 0:33
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This is a server. Use a static IP.

To do this, open up /etc/network/interfaces and add this:

iface eth0 inet static
        address 192.168.1.25
        netmask 255.255.255.0
        gateway 192.168.1.1

Of course, set the IPs to the proper values.

address --> IP Address you want the server to have
netmask --> Your system's NetMask (usually 255.255.255.0)
gateway --> Your router's IP address

Remove this line if it exists:

iface eth0 inet dynamic


Now, you have IP addresses assigned. You need a DNS server to use hostnames on the Internet. Do this by opening /etc/resolv.conf and removing all nameserver lines. Then, add these:

nameserver 8.8.8.8
nameserver 8.8.4.4

Replace above IPs with whatever nameserver/DNS server you want to use.

Finally, reboot (Will almost always work) or run the below command to apply the changes.

sudo ifdown eth0 && sudo ifup eth0

(Src)

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