[docs] docs for running Tensorboard without sudo (#5015)
[docs] docs for running Tensorboard without sudo (#5015)

* Instructions for running Tensorboard without sudo

When we run Tensorboard to visualize the results of Ray outputs on multi-user clusters where we don't have sudo access, such as RISE clusters, a few commands need to first be run to make sure tensorboard can edit the tmp directory. This is a pretty common usecase so I figured we may as well put it in the documentation for Tune.

* Update tune-usage.rst

robertnishihara/ray,ray-project/ray,stephanie-wang/ray,robertnishihara/ray,ray-project/ray,richardliaw/ray,stephanie-wang/ray,pcmoritz/ray-1,stephanie-wang/ray,pcmoritz/ray-1,ray-project/ray,pcmoritz/ray-1,ray-project/ray,ujvl/ray-ng,richardliaw/ray,stephanie-wang/ray,ray-project/ray,richardliaw/ray,stephanie-wang/ray,robertnishihara/ray,ujvl/ray-ng,richardliaw/ray,stephanie-wang/ray,robertnishihara/ray,pcmoritz/ray-1,robertnishihara/ray,ujvl/ray-ng,richardliaw/ray,ujvl/ray-ng,ray-project/ray,pcmoritz/ray-1,richardliaw/ray,robertnishihara/ray,pcmoritz/ray-1,ray-project/ray,robertnishihara/ray,stephanie-wang/ray,stephanie-wang/ray,ray-project/ray,richardliaw/ray,richardliaw/ray,pcmoritz/ray-1,pcmoritz/ray-1,robertnishihara/ray,robertnishihara/ray,stephanie-wang/ray