I have a laptop with Ubuntu 11.04. Failed to connect my home wireless network, which is composed of a modem and a Netgear router.
ifconfig showing:
wlan0 Link encap:Ethernet HWaddr 00:24:d6:07:2b:a2
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:30238 errors:0 dropped:0 overruns:0 frame:0
TX packets:24005 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:26945081 (26.9 MB) TX bytes:3169731 (3.1 MB)
wlan0:avahi Link encap:Ethernet HWaddr 00:24:d6:07:2b:a2
inet addr:169.254.6.188 Bcast:169.254.255.255 Mask:255.255.0.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
iwconfig showing :
wlan0 IEEE 802.11abgn ESSID:"mywirelessnetwork"
Mode:Managed Access Point: Not-Associated Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
I do not quite understand how the virtual interface wlan0:avahi appeared. My guess was, my request sudo dhclient wlan0
failed to get a valid ip, although I did not get any error message from running that command. I executed sudo dhclient wlan0
again, but still no error message or network connection.
Later today, I tried to connect to a public wireless network. Still got the same error. But when I reboot my machine, no such problems.
I am confused by the wired situations. Is there anything wrong with my network configuration? What should I do if I encounter similar problems in future?
Best Answer
May I suggest that you run the command
This will show the contents of the interfaces file. It should read
If there is anything else in this file then edit it out by this command
This will open the interfaces file in gedit with sudo permissions. So you can edit the file and save it. I had to do this once when I somehow got wlan0:avahi as the wireless connection and I could not remove it any other way. You may need to re-start and then Network manager will do its stuff.
Regards.