from: can't read /var/mail/beginner_tutorials.srv在rosrun时出错

ROS/Tutorials/ExaminingServiceClient在rosrun出错

按照官网教程输入

rosrun beginner_tutorials add_two_ints_server.py

出现from: can't read /var/mail/beginner_tutorials.srv错误，问题在于.bashrc

解决办法： 在终端输入：source ~/catkin_ws/devel/setup.bash后，再输入rosrun beginner_tutorials add_two_ints_server.py即可