To manage your nodes, use , the coolest SSH client and terminal around :)
To track your server uptime and resources usage use , you can track up to 15 servers for free and the setup is very easy
Internal tools
vnstat - monitor bandwidth and data flow
sudo apt update && sudo apt install vnstat
To check the current bandwidth usage use vnstat.
To check hourly stats e use vnstat -h.
Daily: vnstat -d. Monthly: vnstat -m. Top 10 traffic days: vnstat -t.