Now you need to install qcustomplot. There are two versions that are commonly found in linux distros: 1.3 and 2.0. Either will work fine. If you are not sure which version your linux install comes with, simply run both commands. One will work and the other will fail, and that's fine!
qcustomplot1.3 for older linux versions (Linux Mint 19.x, Ubuntu 18.04):
### 4. You can now launch wfview, either from the terminal or from your desktop environment. If you encounter issues using the serial port, run the following command: