在ubuntu中安装darknet

创建的ros工作空间ros_ws

第一步：进入/ros_ws/src中，打开终端，克隆darknet_ros包到该目录中：

git clone https://github.com/leggedrobotics/darknet_ros.git

第二步：需要进入darknet_ros包的根目录，并更新子模块：

cd darknet_ros

git submodule update --init --recursive

但是我执行该命令时提示如下

xtark@xtark-robot:~/ros_ws/src/darknet_ros$ git submodule update --init --recursive Submodule 'darknet' (https://github.com/leggedrobotics/darknet) registered for path 'darknet' fatal: destination path '/home/xtark/ros_ws/src/darknet_ros/darknet' already exists and is not an empty directory. fatal: clone of 'https://github.com/leggedrobotics/darknet' into submodule path '/home/xtark/ros_ws/src/darknet_ros/darknet' failed Failed to clone 'darknet'. Retry scheduled fatal: destination path '/home/xtark/ros_ws/src/darknet_ros/darknet' already exists and is not an empty directory.