@ganyuanzhen 我懂了！！！感谢，问题出在，我应该新建一个英文名称的文件夹，然后在新建文件中运行终端命令！而不应该直接在桌面运行终端。
liu@liu-virtual-machine:~/ROS$ git clone https://github.com/fishros/fishbot.git -b v1.0.0 --depth=1 Cloning into 'fishbot'... remote: Enumerating objects: 84, done. remote: Counting objects: 100% (84/84), done. remote: Compressing objects: 100% (69/69), done. remote: Total 84 (delta 21), reused 46 (delta 7), pack-reused 0 Receiving objects: 100% (84/84), 332.98 KiB | 422.00 KiB/s, done. Resolving deltas: 100% (21/21), done. liu@liu-virtual-machine:~/ROS$ cd fishbot liu@liu-virtual-machine:~/ROS/fishbot$ rosdep install --from-paths src --ignore-src -y -r # 安装依赖 #All required rosdeps installed successfully liu@liu-virtual-machine:~/ROS/fishbot$ colcon build Starting >>> fishbot_bringup Starting >>> fishbot_cartographer Finished <<< fishbot_cartographer [0.53s] Starting >>> fishbot_description Finished <<< fishbot_description [0.57s] Starting >>> fishbot_interfaces Finished <<< fishbot_interfaces [7.94s] Starting >>> fishbot_navigation2 Finished <<< fishbot_navigation2 [0.63s] Finished <<< fishbot_bringup [13.5s] Summary: 5 packages finished [13.9s]