[ERROR] [WallTime: 1511043999.000666] Unable to immediately register with master node [http://localhost:11311]: master may not be running yet. Will keep trying
i got this error while trying to install teleop twist keyboard controls
This doesn't make much sense; this is a runtime error, not something that can happen during installation. If you can update your question with the command that you're running and copy and paste the output here, we can probably help figure out what's going on.