ROS commands don't work

I am starting the ROS course in 5 days and when I run ‘rosrun rviz rviz’, ‘roslaunch bb_8_teleop keyboard_teleop.launch’ or any other ros command I get the same message: ‘bash: rosrun(roslaunch, etc): command not found’.
What can I do?

Hello ,

Could you change to another course and see if this problem persists? I’ve been doing some tests in the platform and everything seems to be working fine, so maybe it’s an isolated issue with your workspace, which will be reset by changing to another course.


In another course I am taking, everything works perfectly. But it doesn’t work in the ROS course in 5 days.

I’ve reset your workspace, everything should work fine now.

Now it really works! Thank you very much!