How To Fix Local IP Address Problem In Linux (Ubuntu)

This could be a very frequent Network problem for Linux users . No internet connection , no LAN connection are the effects of this problem . The very basic necessity for you to get connected to the internet or access your network resources like shared folders etc is to an IP address . Your computer should get an ip address typically from a router . IN most situations routers have DHCP enabled and it should give ubuntu an ip address for internet or network access . Now incase you aren't able to access the internet or the network the first thing you should check is whether you are getting an ip address or not ( typically 192.168.0.x or 192.168.1.x ) . This tutorial would tell you what you should do if you dont see an ip address in your ifconfig output . SO here' what you need to do :

Firstly , your ifconfig output would look something like this :

prash@prash-laptop:~$ ifconfig
eth0 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:16

Now if you look at this ifconfig output , you would notice that eth0 doesnt have an ip address . But the router i am connected to has DHCP enabled and i should be getting an ip. SO in such cases all you need to do is go to the Terminal and type sudo dhclient eth0 . This would tell ubuntu to look for DHCPOFFERS from the router is connected to. So then you would get an ip address.

NOTE: In the above example i had used the command sudo dhclient eth0 because eth0 didn't get an ip address. In your case it could be eth1 or wlan0 or whatever.. So make the necessary changes!!