Howto Install NVIDIA CUDA 11.5 on Linux Mint 20.3/20.2

This is guide, howto install NVIDIA CUDA Toolkit 11.5 Update 1 on Linux Mint 20.3/20.2. I assume here that you have installed NVIDIA drivers successfully using Fedora NVIDIA Drivers Install Guide (https://youtu.be/2eKLVKb3cPk). Currently you will need NVIDIA 495.xx drivers. As always remember backup important files before doing anything!

Check full guide with current NVIDIA CUDA 11.5 Update 1 install command line commands from here:
https://www.if-not-true-then-false.com/2021/install-nvidia-cuda-toolkit-on-ubuntu-debian-linux-mint/

⭐️ Table of contents ⭐️
00:00 Install NVIDIA CUDA on Linux Mint 20.3/20.2
00:07 Check that you have latest NVIDIA drivers 495.xx installed
00:44 Start NVIDIA CUDA installation
00:59 Download latest NVIDIA CUDA run installer
01:49 Make NVIDIA CUDA installer executable
01:59 Change root user
02:12 Fully update your Linux Mint
02:35 Install needed dependencies
03:08 Run NVIDIA CUDA installer
03:20 Accept NVIDIA CUDA license agreement
03:34 Select NVIDIA CUDA components
03:54 Select NVIDIA CUDA samples install path
04:18 Install NVIDIA CUDA
04:30 Check NVIDIA CUDA installation summary
04:45 Change NVIDIA CUDA Samples directory owner and group
05:16 Append scripts to .bashrc (.zshrc) to add CUDA to PATH
05:57 Vefiry .bashrc (or .zshrc) content
06:12 Then log out and log in to update PATH, LD_LIBRARY_PATH, GLPATH, GLLINK and DFLT_PATH
06:53 Verify PATH and LD_LIBRARY_PATH, GLPATH, GLLINK and DFLT_PATH
07:39 Test your NVIDIA CUDA installation, compile and run deviceQuery
08:05 Check your NVIDIA card and CUDA Driver / Runtime version
08:27 Run some other NVIDIA CUDA samples
08:56 Testing Mandelbrot
09:57 Testing nbody
10:53 Testing nbody -benchmark
11:31 Testing oceanFFT