failed to start core service [/rosout]
Error: cannot launch node of type [rosout/rosout] : cannot locate node of type [rosout] in package [rosout] make sure file exists in package path and permission is set to executable (chmod +x) RLException: failed to start core service [/rosout] The traceback for the exception was written to the log file
Sounds like your ROS installation is incomplete. How did you install it? Can you verify using
dpkg -la | grep ros-
that all the core packages are there?