title: ImportError: libGL.so.1: cannot open shared object file: No such file or directory
body: <p>I am trying to run cv2, but when I try to import it, I get the following error:</p>
  <p><code>ImportError: libGL.so.1: cannot open shared object file: No such file or directory</code></p>
  <p>The suggested solution online is installing</p>
  <p><code>apt install libgl1-mesa-glx</code></p>
  <p>but this is already installed and the latest version.</p>
  <p>NB: I am actually running this on Docker, and I am not able to check the OpenCV version. I tried importing matplotlib and that imports fine.</p>