This message was posted on behalf of Intel Corporation
I can see in your screenshot that you are on a older version of Edison's image. If you flash the latest version of the image (which can be found in https://software.intel.com/en-us/iot/hardware/edison/downloads) it is very probable that the issue will be resolved.
If for some reason you can't flash the Edison, I'd suggest you to try something like the guide found in http://www.howtogeek.com/50631/how-to-change-your-linux-hostname-without-rebooting/.
Let me know if this information helps you.