How do i know whether my NIC works or not?

[Amedee Van Gasse]

On 30-12-09 09:31, arshad wrote:

> arshad at arshad-desktop:~$ sudo ifup eth0
> Internet Systems Consortium DHCP Client V3.1.1
> Copyright 2004-2008 Internet Systems Consortium.
> All rights reserved.
> For info, please visit http://www.isc.org/sw/dhcp/
>
> Listening on LPF/eth0/00:e0:4d:af:6e:4f
> Sending on   LPF/eth0/00:e0:4d:af:6e:4f
> Sending on   Socket/fallback
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 11
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 18
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 16
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 2
> No DHCPOFFERS received.
> No working leases in persistent database - sleeping.

> arshad at arshad-desktop:~$ sudo dhclient
> There is already a pid file /var/run/dhclient.pid with pid 5066
> killed old client process, removed PID file
> Internet Systems Consortium DHCP Client V3.1.1
> Copyright 2004-2008 Internet Systems Consortium.
> All rights reserved.
> For info, please visit http://www.isc.org/sw/dhcp/
>
> Listening on LPF/pan0/4a:50:8d:30:6c:ca
> Sending on   LPF/pan0/4a:50:8d:30:6c:ca
> Listening on LPF/usb0/02:80:37:14:03:00
> Sending on   LPF/usb0/02:80:37:14:03:00
> Listening on LPF/eth0/00:e0:4d:af:6e:4f
> Sending on   LPF/eth0/00:e0:4d:af:6e:4f
> Sending on   Socket/fallback
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4
> DHCPDISCOVER on pan0 to 255.255.255.255 port 67 interval 4
> DHCPDISCOVER on usb0 to 255.255.255.255 port 67 interval 5
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6
> DHCPDISCOVER on pan0 to 255.255.255.255 port 67 interval 6
> DHCPDISCOVER on usb0 to 255.255.255.255 port 67 interval 13
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 13
> DHCPDISCOVER on pan0 to 255.255.255.255 port 67 interval 15
> DHCPDISCOVER on usb0 to 255.255.255.255 port 67 interval 7
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12
> DHCPDISCOVER on pan0 to 255.255.255.255 port 67 interval 21
> DHCPDISCOVER on usb0 to 255.255.255.255 port 67 interval 14
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 14
> DHCPDISCOVER on usb0 to 255.255.255.255 port 67 interval 15
> DHCPDISCOVER on pan0 to 255.255.255.255 port 67 interval 13
> DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12
> DHCPDISCOVER on usb0 to 255.255.255.255 port 67 interval 7
> DHCPDISCOVER on pan0 to 255.255.255.255 port 67 interval 2
> No DHCPOFFERS received.
> No working leases in persistent database - sleeping.
>
>
>

dhclient isn't needed in this particular case because it already runs 
when you do ifup eth0.

-- 
Amedee