rosdep a key tool installation dependency problems [records]

First of all, no matter what a ros release, the first terminal cdto switch to the workspace directory

1, run the command

rosdep update

Note: This step is a bad time network conditions, most of the failure can be ignored, then the first catkin_makelook, will complain the lack of dependencies , then the next step, the effect is almost pro-test.

2, according to the release ros select the appropriate command

A command key installed using the kinetic missing dependency:

rosdep install --from-paths src --ignore-src --rosdistro=kinetic -y

Use of a command key installed melodic missing dependency:

rosdep install --from-paths src --ignore-src --rosdistro=melodic -y