It seems that none of my two snappy systems can access the Internet. When I run 'snappy list -u' I get the following error message:

Get https://system-image.ubuntu.com//ubuntu-core/15.04/stable/generic_amd64/index.json: dial tcp i/o timeout

The above I get from a virtual snappy installation on VirtualBox. I also get a similar error from a snappy 15.04 stable (running from SD card) on a BeagleBone Black. The board is connected to LAN (because I can ssh to it from my desktop) but apparently it does not have Internet (pinging www.google.com, it says 0 packets received).

The BeagleBone Black is a new installation, but I am sure that I had Internet on the virtual machine before.

Does anybody else have this problem, or am I doing something wrong?


I found what was wrong. The network at my place required MAC address registration, and I forgot to do that for my BeagleBone Black. After registering my BBB's MAC address in the online registration form, I can make it see the Internet.

Here I just document the process in the hope that another networking-noob like me could benefit. Please correct me if I am doing something totally wrong or inefficient.

There are two LAN sockets in my room, one connected to my desktop and one for my BBB. I checked my own internal IP address using:

ifconfig | grep "inet addr:"

And that was something like ''. Then, I searched for my BBB in the network, assuming that it also has an IP like '21.263.89.xx':

sudo nmap -PR -sP

This will give me a long list of all devices of mine and my colleagues. I looked for this:

Nmap scan report for
Host is up (-0.099s latency).
MAC Address: aa:bb:CC:dD:Ee:ff (Texas Instruments)

From this I know the IP address of my BBB. Now I can ssh into it:

ssh ubuntu@
|improve this answer|||||

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.