root@armadillo:~# ip a                                                          
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group defau0
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00                       
    inet 127.0.0.1/8 scope host lo                                              
       valid_lft forever preferred_lft forever                                  
    inet6 ::1/128 scope host                                                    
       valid_lft forever preferred_lft forever                                  
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DO0
    link/ether 00:11:0c:2a:21:63 brd ff:ff:ff:ff:ff:ff                          
3: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN group default qlen 1000    
    link/sit 0.0.0.0 brd 0.0.0.0                                                
4: tun0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast st0
    link/none                                                                   
    inet 10.8.0.1 peer 10.8.0.2/32 scope global tun0                            
       valid_lft forever preferred_lft forever                                  
    inet6 fe80::4e99:471f:ef6b:568c/64 scope link stable-privacy                
       valid_lft forever preferred_lft forever                                  
5: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast st3
    link/ppp                                                                    
    inet 10.75.23.9 peer 192.168.50.1/32 scope global ppp0                      
       valid_lft forever preferred_lft forever