ifconfig -a output:
eth0      Link encap:Ethernet  HWaddr B8:27:EB:DA:97:54  
          inet addr:192.168.178.21  Bcast:192.168.178.255  Mask:255.255.255.0
          inet6 addr: 2003:d1:6f0d:8300:ba27:ebff:feda:9754/64 Scope:Global
          inet6 addr: fe80::ba27:ebff:feda:9754/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:10199 errors:0 dropped:176 overruns:0 frame:0
          TX packets:3241 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:14591524 (13.9 MiB)  TX bytes:511710 (499.7 KiB)

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:65536  Metric:1
          RX packets:13 errors:0 dropped:0 overruns:0 frame:0
          TX packets:13 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:970 (970.0 B)  TX bytes:970 (970.0 B)

wlan0     Link encap:Ethernet  HWaddr 74:DA:38:6F:01:42  
          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)



iwconfig output:
wlan0     unassociated  Nickname:"<WIFI@REALTEK>"
          Mode:Auto  Frequency=2.412 GHz  Access Point: Not-Associated   
          Sensitivity:0/0  
          Retry:off   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality:0  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

