sudo apt-get update
sudo git clone https://github.com/ahmetb/kubectx /usr/local/kubectx
sudo ln -s /usr/local/kubectx/kubectx /usr/local/bin/kubectx
sudo ln -s /usr/local/kubectx/kubens /usr/local/bin/kubens
Enter kubens in your console and you should be able to see your namespaces