In case any of you are running cinnamon desktop (probably nobody,) there's a desklet called Command Result that you can make into your own personal block clock.

Install electrum (sudo apt-get install electrum) on your desktop.

If you're running your own bitcoin full-node with an electrum server, then fill in your private electrum IP below. If not, find a public one and use that.

Go to startup applications and add this command to be run upon login:

electrum daemon -s [Your Private Electrum Server IP]:50002:s -1 -d

Then, install the desklet mentioned above and add a command named BTC Block Height with the following, and set it up update very minute.

electrum  getinfo | jq -a '.blockchain_height'

Now you have a desktop block clock!