I have a cluster of five nodes. One node is new and is running the latest 4.4 but the others are all running 4.2. I want to upgrade the whole cluster to 5.x but before I do that, I know I need to get all nodes up to the latest 4.4. Is that simply as case of running:
apt-get update
apt-get dist-upgrade (or is it just upgrade?)
reboot
apt-get update
apt-get dist-upgrade (or is it just upgrade?)
reboot