Glances

glances : shell monitoring tool

a cross-platform command-line curses-based system monitoring tool written in Python language which use the psutil library to grab informations from the system.
monitor CPU, Load Average, Memory, Network Interfaces, Disk I/O, Processes and File System spaces utilization.

https://www.tecmint.com/glances-an-advanced-real-time-system-monitoring-tool-for-linux/

can be installed with:
sudo snap install glances # version 3.1.5, or
sudo apt install glances # version 3.1.3-1

See ‘snap info glances’ for additional versions.