Download and install the robo3t:
$ cd /tmp
$ wget https://download.robomongo.org/1.1.1/linux/robo3t-1.1.1-linux-x86_64-c93c6b0.tar.gz
$ sudo tar -zxvf robo3t-1.1.1-linux-x86_64-c93c6b0.tar.gz -C /opt
$ sudo ln -s /opt/robo3t-1.1.1-linux-x86_64-c93c6b0/bin/robo3t /usr/bin/robo3t
$ rm robo3t-1.1.1-linux-x86_64-c93c6b0.tar.gz
Create ubuntu desktop entry: