Command: cythonize rednose/helpers/ekf_sym_pyx.pyx Error: sh: 1: cythonize: not found I have recently installed Ubuntu 22.04. I was trying to install https://github.com/commaai/rednose. Few days back, while working on Ubuntu 18.04, I got the same issue, I solved it by using pip3 install cython. On Ubuntu 22.04, it's not solving the same way. What's the proper way to install the cythonize command? Continue reading...