issue #20448: variable client is null if there's an error
Merge pull request #437 from shackbarth/20448

issue #20448: variable client is null if there's an error
Merge pull request #438 from jrogelstad/master

More instructions.
Merge pull request #439 from jrogelstad/master

Tweaks
Update README.md
Update UBUNTU_SETUP.md

tweaks
Update UBUNTU_SETUP.md
Update UBUNTU_SETUP.md
Update UBUNTU_SETUP.md
Update UBUNTU_SETUP.md