update how to get IP address on Linux, in the readme

README.md

@@ -691,14 +691,31 @@ eval $(docker-machine env)
 ```bash
 docker-machine ip default
 ```
+If your Host name is different then `default`, you have to specify it (`docker-machine ip my-host`).
+
 *(The default IP is 192.168.99.100)*
 
+> **boot2docker** users: run `boot2docker ip` *(when boot2docker is up)*.
+
+<br>
 **On Linux:** 
 
-Your IP Address is `127.0.0.1`
+1 - Run `ifconfig` in the terminal.
 
-> **boot2docker** users: run `boot2docker ip` *(when boot2docker is up)*.
+2 - In the result search for `docker0`, your IP address will be next to `inet addr`.
+
+Example: (In this example your IP address is `172.17.0.1`).
 
+```shell
+docker0   Link encap:Ethernet  HWaddr 02:42:41:2d:c4:24
+          inet addr:172.17.0.1  Bcast:0.0.0.0  Mask:255.255.0.0
+          UP 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:0
+          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
+```
+>If you have an easier way to do it, share it with us.