What do you get when you type ifconfig ?
Something like this?
abc@zaphod$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:11:D8:33:7D:F2
inet addr:192.168.2.252 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::211:d8ff:fe33:7df2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9322814 errors:0 dropped:0 overruns:0 frame:0
TX packets:31991928 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3367400074 (3.1 GB) TX bytes:109933767 (104.8 MB)
Interrupt:21 Base address:0x2400
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:1559659 errors:0 dropped:0 overruns:0 frame:0
TX packets:1559659 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:228304340 (217.7 MB) TX bytes:228304340 (217.7 MB)
When you type cat /etc/resolv.conf ?
Somthing like this?
abc@zaphod$ cat /etc/resolv.conf
# generated by NetworkManager, do not edit!
nameserver 192.168.2.1
When you type cat /etc/network/interfaces ?
Something like this?
abc@zaphod$ cat /etc/network/interfaces
auto lo
iface lo inet loopback
iface eth0 inet static
address 192.168.2.252
netmask 255.255.255.0
gateway 192.168.2.1
auto eth0