Show/Change Android routing table and DNS server

From ADB shell:

1. show Android routing table:
   

   # cat /proc/net/route 
   

   
   or
   

   # ip route show
   

2. show DNS server:
   

   # getprop net.dns1
   # getprop net.dns2
   

3. set DNS server:
   

   # setprop net.dns1 107.86.113.12
   # setprop net.dns1 107.86.113.15
   

4. add a default gateway
   

   # route add default gw 192.168.0.1 dev wifi