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To put it simply: your computer needs to know where to find the programs to run and where ROS is. This is setting up your terminal’s environment to know where to find the ROS commands and your software packages in the workspace.
Asked: 2020-05-08 11:51:48 -0500
Seen: 92 times
Last updated: May 08 '20
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This is a duplicate of at least #q251292, #q188309, #q250823, #q241528, #q269784, #q124131, #q292566 and #q229365. And #q286466 contains even more links to other Q&As which explain this.
It's really nice that @stevemacenski wrote yet another answer, but @Bobby: please try to search for existing Q&As before posting new ones.
Use Google: add
site:answers.ros.orgto your search query. It should turn up many relevant results.