whisper@HOLOCRON:~$ iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

eth1      IEEE 802.11g  ESSID:"linksys"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:18:39:DC:39:62   
          Bit Rate:54 Mb/s   Tx-Power:15 dBm   
          Retry limit:15   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=90/100  Signal level=-40 dBm  Noise level=-41 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:7031   Missed beacon:0

whisper@HOLOCRON:~$ airmon-ng start eth1
Run it as root
whisper@HOLOCRON:~$ sudo airmon-ng start eth1
[sudo] password for whisper:


Interface       Chipset         Driver

eth1            Centrino b/g    ipw3945 (monitor mode enabled)

whisper@HOLOCRON:~$ sudo aireplay-ng -9 wlan0
Interface wlan0: 
ioctl(SIOCGIFINDEX) failed: No such device
whisper@HOLOCRON:~$ sudo aireplay-ng -9 eth1

ARP linktype is set to 1 (Ethernet) - expected ARPHRD_IEEE80211
or ARPHRD_IEEE80211_PRISM instead.  Make sure RFMON is enabled:
run 'ifconfig eth1 up; iwconfig eth1 mode Monitor channel <#>'
Sysfs injection support was not found either.

whisper@HOLOCRON:~$ iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

eth1      IEEE 802.11g  ESSID:"linksys"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:18:39:DC:39:62   
          Bit Rate:54 Mb/s   Tx-Power:15 dBm   
          Retry limit:15   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=94/100  Signal level=-38 dBm  Noise level=-39 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:7043   Missed beacon:0

whisper@HOLOCRON:~$ sudo airmon-ng start monitor eth1


Interface       Chipset         Driver

eth1            Centrino b/g    ipw3945

whisper@HOLOCRON:~$ iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

eth1      IEEE 802.11g  ESSID:"linksys"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:18:39:DC:39:62   
          Bit Rate:54 Mb/s   Tx-Power:15 dBm   
          Retry limit:15   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=93/100  Signal level=-39 dBm  Noise level=-40 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:7043   Missed beacon:0

whisper@HOLOCRON:~$