ros_setup

Noetic安装 §

错误The following packages have unmet dependencies §

• 在安装前不要改动Ubuntu的Software & Updates里的选项，否则会出现错误The following packages have unmet dependencies

  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:
  
  The following packages have unmet dependencies:
   ros-noetic-desktop-full : Depends: ros-noetic-desktop but it is not going to be installed
                             Depends: ros-noetic-perception but it is not going to be installed
                             Depends: ros-noetic-simulators but it is not going to be installed
                             Depends: ros-noetic-urdf-sim-tutorial but it is not going to be installed
  E: Unable to correct problems, you have held broken packages.
  

  解决方案：在Show Applications中选择Software & Updates，修改，并且退出使得其更新（Reload），再执行安装

项目	选中项
Subscribe to	All updates
Automatically check for updates	Daily
When there are security updates	Display immediatly
When there are other updates	Display immediatly
Notify me of a new Ubuntu vewrsion	For any new version
我也不知道是哪个影响了结果

添加devel §

• 在安装完成后，在.bashrc中添加

source /opt/ros/noetic/setup.bash
source ~/catkin_ws/devel/setup.bash