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one easy way to check if ROS is running is to type "rostopic list" in command-line and see if there are any current topics.

~~one easy way~~ If you want to ~~check if ROS is running is to type~~ do it in a script, run a regex over the output of "rostopic list" for "/rosout." If its not in ~~command-line and see if there are any current topics.~~the output then the roscore is not running.

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