[update]:修改原始的一键安装命令

docs/chapt2/2.3ROS2的安装.md

@@ -7,10 +7,10 @@
 **小鱼最新一行代码安装ROS2：**
 
 ```
-wget http://fishros.com/install -O fishros && sudo bash fishros
+wget http://fishros.com/install -O fishros && bash fishros
 ```
 
-由于脚本bug，需要重新开一个终端环境变量才会生效，所以这里需要使用`Ctrl+Alt+T`打开一个新的终端，输入ros2如果看到下面的界面则安装成功
+安装完成后输入ros2如果看到下面的界面则安装成功
 
 ![image-20210909002610222](2.3ROS2的安装/imgs/image-20210909002610222.png)
 
@@ -22,25 +22,26 @@ wget http://fishros.com/install -O fishros && sudo bash fishros
 ### 2.2 下载秘钥
 
 ```
-sudo curl -sSL https://raw.githubusercontent.com/ros/rosdistro/master/ros.key  -o /usr/share/keyrings/ros-archive-keyring.gpg
+sudo apt install curl gnupg2 -y
+curl -s https://gitee.com/ohhuo/rosdistro/raw/master/ros.asc | sudo apt-key add -
 ```
 
 ### 2.3 导出到系统
 
 ```
-echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/ros-archive-keyring.gpg] https://mirrors.tuna.tsinghua.edu.cn/ros2/ubuntu/ $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/ros2.list > /dev/null
+echo "deb [arch=$(dpkg --print-architecture)] https://repo.huaweicloud.com/ros2/ubuntu/ $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/ros2.list > /dev/null
 ```
 
 ### 2.4 更新
 
 ```
-sudo apt update
+sudo apt update	
 ```
 
 > 如果遇到了其他问题,欢迎加入qq交流群进行交流:139707339，或者尝试一键安装指令
 >
 > ```
-> sudo apt-get install curl && curl http://fishros.com/tools/install/ros-foxy | bash
+> wget http://fishros.com/install -O fishros && bash fishros
 > ```
 
 ### 2.5 安装ROS2