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怎么更新网站内容,网站建设公司哪家好,总结企业网站建设的流程,网站建设需要版块系统ubuntu22.04 ros2 humble 按照如下视频教程学习的：【古月居】古月ROS2入门21讲 | 带你认识一个全新的机器人操作系统 此处仅记录我报错的地方，以及相应的解决方案，没有出错的略过！ 对应的古月居ROS2入门21讲源码下载地址&a…

系统ubuntu22.04
ros2 humble

按照如下视频教程学习的：【古月居】古月·ROS2入门21讲 | 带你认识一个全新的机器人操作系统

此处仅记录我报错的地方，以及相应的解决方案，没有出错的略过！

对应的古月居ROS2入门21讲源码下载地址：

Gitee：https://gitee.com/guyuehome/ros2_21_tutorials
Github：https://github.com/guyuehome/ros2_21_tutorials

1. 第3讲：3. ROS2安装（我没有问题 ^_^）

视频教程：安装过程参照【古月居】古月·ROS2入门21讲 | 带你认识一个全新的机器人操作系统

或者一键安装：古月居的ROS安利 | ROS一键安装脚本 或者小鱼工具【ROS2】Ubuntu22.04安装ROS humble都可以。

我在这一步没有问题 ^_^

2. 第6讲：6.工作空间与功能包，开发过程的大本营

我在6.工作空间与功能包，开发过程的大本营这一步出错：

2.1 rosdepc install报错：Cannot locate rosdep definition for [rospy]

rosdepc install -i --from-path src --rosdistro humble -y

运行上面的指令时，报错：

xj@xj:~/dev_ws$ rosdep install -i --from-path src --rosdistro humble -y
ERROR: the following packages/stacks could not have their rosdep keys resolved
to system dependencies:
learning_service: Cannot locate rosdep definition for [rospy]
learning_topic: Cannot locate rosdep definition for [rospy]
learning_parameter: Cannot locate rosdep definition for [rospy]
learning_launch: Cannot locate rosdep definition for [catkin]
learning_tf: Cannot locate rosdep definition for [tf]
xj@xj:~/dev_ws$

直接安装缺失的包，我按照下面的指令安装后就可以colcon build了

sudo apt-get install python3-rospy

确实缺挺多包的：

xj@xj:~/dev_ws$ sudo apt-get install python3-rospy
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following additional packages will be installed:python3-catkin python3-genmsg python3-genpy python3-roscpp-msg python3-rosgraphpython3-rosgraph-msgs python3-roslib python3-rospkg python3-std-msgs
The following NEW packages will be installed:python3-catkin python3-genmsg python3-genpy python3-roscpp-msg python3-rosgraphpython3-rosgraph-msgs python3-roslib python3-rospkg python3-rospy python3-std-msgs
0 upgraded, 10 newly installed, 0 to remove and 5 not upgraded.
Need to get 248 kB of archives.
After this operation, 1,585 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 https://mirrors.xjtu.edu.cn/ubuntu jammy/universe amd64 python3-catkin all 0.8.10-7 [22.8 kB]
Get:2 https://mirrors.xjtu.edu.cn/ubuntu jammy/universe amd64 python3-genmsg all 0.5.16-5 [23.7 kB]
Get:3 https://mirrors.xjtu.edu.cn/ubuntu jammy/universe amd64 python3-genpy all 0.6.16-1 [31.4 kB]
Get:4 https://mirrors.xjtu.edu.cn/ubuntu jammy/universe amd64 python3-roscpp-msg all 1.15.14+ds-2build2 [6,782 B]
Get:5 https://mirrors.xjtu.edu.cn/ubuntu jammy/universe amd64 python3-rosgraph all 1.15.14+ds-2build2 [30.9 kB]
Get:6 https://mirrors.xjtu.edu.cn/ubuntu jammy/universe amd64 python3-std-msgs all 0.5.13-2 [10.7 kB]
Get:7 https://mirrors.xjtu.edu.cn/ubuntu jammy/universe amd64 python3-rosgraph-msgs all 1.11.3-2 [7,272 B]
Get:8 https://mirrors.xjtu.edu.cn/ubuntu jammy/universe amd64 python3-roslib all 1.15.8-3 [36.8 kB]
Get:9 https://mirrors.xjtu.edu.cn/ubuntu jammy/universe amd64 python3-rospy all 1.15.14+ds-2build2 [75.5 kB]
Get:10 http://packages.ros.org/ros2/ubuntu jammy/main amd64 python3-rospkg all 1.5.1-100 [2,524 B]
Fetched 248 kB in 2s (146 kB/s)             
Selecting previously unselected package python3-catkin.
(Reading database ... 300924 files and directories currently installed.)
Preparing to unpack .../0-python3-catkin_0.8.10-7_all.deb ...
Unpacking python3-catkin (0.8.10-7) ...
Selecting previously unselected package python3-genmsg.
Preparing to unpack .../1-python3-genmsg_0.5.16-5_all.deb ...
Unpacking python3-genmsg (0.5.16-5) ...
Selecting previously unselected package python3-genpy.
Preparing to unpack .../2-python3-genpy_0.6.16-1_all.deb ...
Unpacking python3-genpy (0.6.16-1) ...
Selecting previously unselected package python3-roscpp-msg.
Preparing to unpack .../3-python3-roscpp-msg_1.15.14+ds-2build2_all.deb ...
Unpacking python3-roscpp-msg (1.15.14+ds-2build2) ...
Selecting previously unselected package python3-rospkg.
Preparing to unpack .../4-python3-rospkg_1.5.1-100_all.deb ...
Unpacking python3-rospkg (1.5.1-100) ...
Selecting previously unselected package python3-rosgraph.
Preparing to unpack .../5-python3-rosgraph_1.15.14+ds-2build2_all.deb ...
Unpacking python3-rosgraph (1.15.14+ds-2build2) ...
Selecting previously unselected package python3-std-msgs.
Preparing to unpack .../6-python3-std-msgs_0.5.13-2_all.deb ...
Unpacking python3-std-msgs (0.5.13-2) ...
Selecting previously unselected package python3-rosgraph-msgs.
Preparing to unpack .../7-python3-rosgraph-msgs_1.11.3-2_all.deb ...
Unpacking python3-rosgraph-msgs (1.11.3-2) ...
Selecting previously unselected package python3-roslib.
Preparing to unpack .../8-python3-roslib_1.15.8-3_all.deb ...
Unpacking python3-roslib (1.15.8-3) ...
Selecting previously unselected package python3-rospy.
Preparing to unpack .../9-python3-rospy_1.15.14+ds-2build2_all.deb ...
Unpacking python3-rospy (1.15.14+ds-2build2) ...
Setting up python3-genmsg (0.5.16-5) ...
Setting up python3-rospkg (1.5.1-100) ...
Setting up python3-rosgraph (1.15.14+ds-2build2) ...
Setting up python3-genpy (0.6.16-1) ...
Setting up python3-std-msgs (0.5.13-2) ...
Setting up python3-catkin (0.8.10-7) ...
Setting up python3-roscpp-msg (1.15.14+ds-2build2) ...
Setting up python3-rosgraph-msgs (1.11.3-2) ...
Setting up python3-roslib (1.15.8-3) ...
Setting up python3-rospy (1.15.14+ds-2build2) ...
xj@xj:~/dev_ws$

2.2 colcon build报错

含泪教训：古月居ROS2入门21讲源码下载错了，我原来下载的是ros1的教程源码，但是在ros2系统里编译，而catkin是ros1的编译命令，所以在ros2里就报错了～
在这里插入图片描述
下载ros2的教程源码就可以了！
再次

colcon build

源码编译成功！！

在这里插入图片描述

2.3 验证

上面都没有问题的话，再次运行指令：

rosdepc install -i --from-path src --rosdistro humble -y

不再报错了！！
在这里插入图片描述

终端打印全文

xj@xj:~/dev_ws$ rosdepc install -i --from-path src --rosdistro humble -y
您已经成功安装rosdepc,下面提示的用法中，请将rosdep替换为rosdepc使用～
欢迎使用国内版rosdep之rosdepc，我是作者小鱼！
学习机器人,就关注《鱼香ROS》（公众号|B站|CSDN）！
小鱼rosdepc正式为您服务
executing command [sudo -H apt-get install -y ros-humble-joint-state-publisher-gui]
[sudo] password for xj: 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following additional packages will be installed:ros-humble-joint-state-publisher
The following NEW packages will be installed:ros-humble-joint-state-publisher ros-humble-joint-state-publisher-gui
0 upgraded, 2 newly installed, 0 to remove and 5 not upgraded.
Need to get 31.6 kB of archives.
After this operation, 136 kB of additional disk space will be used.
Get:1 http://packages.ros.org/ros2/ubuntu jammy/main amd64 ros-humble-joint-state-publisher amd64 2.4.0-1jammy.20241128.030805 [16.1 kB]
Get:2 http://packages.ros.org/ros2/ubuntu jammy/main amd64 ros-humble-joint-state-publisher-gui amd64 2.4.0-1jammy.20241128.033111 [15.5 kB]
Fetched 31.6 kB in 2s (19.9 kB/s)                                
Selecting previously unselected package ros-humble-joint-state-publisher.
(Reading database ... 303527 files and directories currently installed.)
Preparing to unpack .../ros-humble-joint-state-publisher_2.4.0-1jammy.20241128.030805_amd64.deb ...
Unpacking ros-humble-joint-state-publisher (2.4.0-1jammy.20241128.030805) ...
Selecting previously unselected package ros-humble-joint-state-publisher-gui.
Preparing to unpack .../ros-humble-joint-state-publisher-gui_2.4.0-1jammy.20241128.033111_amd64.deb ...
Unpacking ros-humble-joint-state-publisher-gui (2.4.0-1jammy.20241128.033111) ...
Setting up ros-humble-joint-state-publisher (2.4.0-1jammy.20241128.030805) ...
Setting up ros-humble-joint-state-publisher-gui (2.4.0-1jammy.20241128.033111) ...
executing command [sudo -H apt-get install -y ros-humble-xacro]
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following NEW packages will be installed:ros-humble-xacro
0 upgraded, 1 newly installed, 0 to remove and 5 not upgraded.
Need to get 36.8 kB of archives.
After this operation, 154 kB of additional disk space will be used.
Get:1 http://packages.ros.org/ros2/ubuntu jammy/main amd64 ros-humble-xacro amd64 2.0.8-1jammy.20241125.233221 [36.8 kB]
Fetched 36.8 kB in 1s (30.2 kB/s)          
Selecting previously unselected package ros-humble-xacro.
(Reading database ... 303571 files and directories currently installed.)
Preparing to unpack .../ros-humble-xacro_2.0.8-1jammy.20241125.233221_amd64.deb ...
Unpacking ros-humble-xacro (2.0.8-1jammy.20241125.233221) ...
Setting up ros-humble-xacro (2.0.8-1jammy.20241125.233221) ...
#All required rosdeps installed successfully
---------------------------------------------------------------------------
---------------------------------------------------------------------------
小鱼科普：rosdep干什么用的？可以跳过吗？https://fishros.org.cn/forum/topic/2124
如果再使用过程中遇到任何问题，欢迎通过fishros.org.cn反馈，或者加入QQ交流群(139707339)
xj@xj:~/dev_ws$

3. 第18讲. Gazebo：三维物理仿真平台

22点07分开始运行gazebo，22点34分还没加载出来gazebo的橘色页面。。。

注：已经按照教程从这个网址https://github.com/osrf/gazebo_models下载文件夹后，重命名为models文件夹，并保存到了~/.gazebo/models路径下了

在这里插入图片描述

3.1. 尝试重启–没用

重启没用。。。

3.2. 问chatgpt–解决

以下操作解决我的问题啦！！chatgpt详细回复见这个网页

为 Gazebo 和 ROS 2 进行环境变量设置：
编辑 ~/.bashrc 文件
添加以下内容：

# Gazebo 环境变量
export GAZEBO_MODEL_PATH=/usr/share/gazebo-${GAZEBO_VERSION}/models
export GAZEBO_PLUGIN_PATH=/usr/lib/gazebo-${GAZEBO_VERSION}/plugins
source /usr/share/gazebo/setup.sh
# ROS 2 环境变量
source /opt/ros/humble/setup.bash

将 ${GAZEBO_VERSION} 替换为 fortress。（我没替换也可以的）
执行以下命令使其生效：

source ~/.bashrc

我按照第2步操作就解决辣！！
在这里插入图片描述


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