I'm running a lightning node on a Raspberry Pi. I'm still learning about the technology and linux as well. But I'm not sure how to securely update my node to the new LND version 0.4.1 and I'd like some directions.

I already downloaded LND binaries and checked the keys.

$ wget https://github.com/lightningnetwork/lnd/releases/download/v0.4.1-beta/lnd-linux-arm-v0.4.1-beta.tar.gz

I used this to install the previous version (0.4-beta)

$ tar -xzf lnd-linux-arm-v0.4-beta.tar.gz
$ ls -la
$ sudo install -m 0755 -o root -g root -t /usr/local/bin lnd-linux-arm-v0.4-beta/*

But how should I proceed if I just want to update, considering I'm not installing from scratch? What commands should I use? Should I backup anything before doing this (like channeldb.db)?