How to view memory CPU and GPU usage in a Linux environment __linux

viewing memory and CPU
command to view memory usage separately: free-m
To view memory and CPU usage commands: Top
You can also install the Htop tool, which is more intuitive,
The installation commands are as follows: sudo apt-get install htop
After installation, direct input command: htop
You can see the memory or CPU usage.

View GPU

Using the Nvidia-smi command

$ nvidia-smi
But this command can only be displayed once, if you want to display in real time, with the watch command, so that a second refresh

$ watch-n 1 Nvidia-smi Graphics Performance Testing Tool
sudo apt install mesa-utils
Glxgears