E: Unable to locate package ros-foxy_demo-nodes-cpp

sunrise@ubuntu:/$ sudo apt install ros-foxy-ros-base ros-foxy_demo-nodes-cpp

Reading package lists… Done

Building dependency tree

Reading state information… Done

E: Unable to locate package ros-foxy_demo-nodes-cpp

安装ros foxy package之前需要先添加ros的源,具体参考:-
2.5. 使用ROS2 package — 地平线机器人平台用户手册 1.0 文档 (horizon.ai)-

按照2.5章节配置好后可以search并install成功:

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