For every newly opened terminals, why do I have to source setup.bash and execute catkin_make again?

asked 2018-03-25 02:57:34 -0500

Seagull
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updated 2021-08-23 01:23:08 -0500

gvdhoorn
86574 ●283 ●1432 ●1054 http://cor.tudelft.nl/

I' m new to ROS, and running ROS kinetic on a raspberry pi 3B with ubuntu installed.

I have noticed that each time I open up a new terminal, I have to source /opt/ros/kinetic/setup.bash and execute catkin_make though I have done so previously in other terminals.

I don' t know whether it is correct to source and catkin_make every time or something has gone wrong. Please help.

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answered 2018-03-25 04:33:45 -0500

gvdhoorn
86574 ●283 ●1432 ●1054 http://cor.tudelft.nl/

I have noticed that each time I open up a new terminal, I have to source /opt/ros/kinetic/setup.bash

yes, that is needed in every terminal (or really: bash instance)

and execute catkin_make

No, that should not be needed.

why do I have to source and execute catkin_make again?

This question has been posted and answered quite a few times already. See the following for related / duplicate questions: #q124131, #q239131, #q229365, #q188309 and #q200174.

And the following questions try to explain why this is needed: #q241528, #q251292 and #q252715.

In short: setup.bash configures your shell so that it can find ROS programs and lets those programs find the required ROS packages.

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Thanks. That solves my problem.

Seagull ( 2018-03-25 23:08:53 -0500 )edit

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answered 2018-03-25 06:49:55 -0500

PeteBlackerThe3rd

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If you want to avoid having to manually source your workspace you can add the line to your .bashrc file.

source <path to my workspace>/devel/setup.bash

Then this will automatically be executed every time you open a new terminal. As gvdhoorn has said, there is no reason you should have to re-catkin_make your workspace in every terminal. Try adding this line to your .bashrc file and let us know if this doesn't solve your problem.

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This is explained in the Q&As that I linked. I didn't want to duplicate all of that again.

gvdhoorn ( 2018-03-25 07:08:56 -0500 )edit

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For every newly opened terminals, why do I have to source setup.bash and execute catkin_make again?

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For every newly opened terminals, why do I have to source setup.bash and execute catkin_make again?