Upgrading a Tezos Node

To update from sources:

Go to the Tezos directory
git fetch
git checkout v7.4
make build-deps
eval $(opam env)
make

Referrence: https://tezos.gitlab.io/releases/version-7.html

Notes:

1. Stop the node before upgrading.
2. If you’re a baker it’s a good idea to have at least two nodes to switch between. Smaller bakers can get away with upgrading between endorsements and blocks, but any baker with 30+ rolls may have a hard time maintaining 100% up-time running a single node.
3. Check your node version after the upgrade. Run: ./tezos-node –help | tail -n 1