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]

With rosnode list you have the list of nodes.

If you want the PID of the node /rosout, for example, you can use:

rosnode info /rosout 2>/dev/null | grep Pid| cut -d' ' -f2

If a node named /rosout exists, the PID (like 5027) will be shown. Otherwise, nothing will be printed because we are redirecting the error to /dev/null

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.