How do i know whether my NIC works or not?

[arshad]

On Mon, 2009-12-28 at 20:14 +0100, Christian Schult wrote:
> Hello arshad,
> 
> arshad wrote:
> 
> > $ ifconfig 
> > eth0      Link encap:Ethernet  HWaddr 00:e0:4d:af:6e:4f  
> >           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:252 Base address:0x8000 
> > 
> > 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:2037 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:2037 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:0 
> >           RX bytes:1049382 (1.0 MB)  TX bytes:1049382 (1.0 MB)
> > 
> > ppp0      Link encap:Point-to-Point Protocol  
> >           inet addr:10.200.216.210  P-t-P:10.64.64.64
> > Mask:255.255.255.255
> >           UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
> >           RX packets:5205 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:5124 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:3 
> >           RX bytes:4945403 (4.9 MB)  TX bytes:767624 (767.6 KB)
> > 
> > usb0      Link encap:Ethernet  HWaddr 02:80:37:14:03:00  
> >           inet6 addr: fe80::80:37ff:fe14:300/64 Scope:Link
> >           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)
> > 
> > and i don't know how to find the dhcp server :( (very sorry)
> 
> Ok, we also need the output of
> 
> $ cat /etc/network/interfaces | grep -v "^#"
> 
> This will print the content of the file /etc/network/interfaces but with
> no comments. Copy that output into your answer.
> 
> Then please do
> 
> $ route -n
> 
> and also send us the output.
> 
> What's that ppp0 device and usb0 device? Is it your mobile phone and
> your router connected via USB? Pull them out, configure network manager
> (that GUI you posted the screenshot of) to use eth0 automatically and
> with dhcp server located at 192.168.1.1, then restart your computer and
> see if you get connected. Else show again output of /sbin/ifconfig and
> route -n.
> 
> 
> Christian
> 

Hello Christian,
yes usb0 device is my mobile phone. and after pulling it out, i can't
select eth0 as the radio button is not active and also if i don't plug
the mobile phone the name of the eth0 is not shown; i mean, if i plug
the mobile the wirednetwork is shown along with its name - Biostar
Microtech Int'l....

another thing,
today i took the machine to the service center, there with their router
internet is working. but with my router its not working. but my router
works with my friens machine. what kind of mystery is this?....

and here are the output for commands you put above:
thank you very much

$ cat /etc/network/interfaces | grep -v "^#"
auto lo
iface lo inet loopback


$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface


$ /sbin/ifconfig
eth0      Link encap:Ethernet  HWaddr 00:e0:4d:af:6e:4f  
          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:252 Base address:0xc000 

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:20 errors:0 dropped:0 overruns:0 frame:0
          TX packets:20 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:1472 (1.4 KB)  TX bytes:1472 (1.4 KB)