I just finish the python for beginers but I really don´t know what instructions type in the shell to go to diferent folders.
Glad to hear that you just finished the Python course.
To move to different folders in the shell, use the
cd Linux command, and the
roscd ROS shortcut. Here some examples below:
user:~$ pwd # show the current directory (folder) /home/user user:~$ ls # list the content of a directory catkin_ws user:~$ cd catkin_ws/ # change to the specified subdirectory user:~/catkin_ws$ ls build devel src user:~/catkin_ws$ cd src user:~/catkin_ws/src$ ls CMakeLists.txt ardrone_action_client.py services_quiz test.cpp topics_quiz will_this_save_on_timeout Untitled.txt my_custom_srv_msg_pkg sos_service.py test.py unit2 actions_quiz my_package sos_service_client.py test2.py unit_3_services user:~/catkin_ws/src$ pwd /home/user/catkin_ws/src user:~/catkin_ws/src$ cd .. # move one level up in the directory tree user:~/catkin_ws$ pwd /home/user/catkin_ws user:~/catkin_ws$ roscd topics_quiz # change to the folder of an existing package user:~/catkin_ws/src/topics_quiz$ pwd /home/user/catkin_ws/src/topics_quiz user:~/catkin_ws/src/topics_quiz$ ls CMakeLists.txt launch package.xml src
You can learn more at http://www.learnshell.org/. Also, we are going to release a FREE Linux basics course soon.
I hope this helps. Keep pushsing your ROS learning!