Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

Revision history [back]

That's what ROS_MASTER_URI is for. You can start roscore on a different port with the --port parameter, e.g.:

roscore --port=11411

Then set the ROS_MASTER_URI to the new URI:

export ROS_MASTER_URI=http://localhost:11411

Now, all ros nodes should contact the core on port 11411. That way, you can run several ros cores on the same machine.

ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.