Some things configured from ros1 to ros2

from ros1 go to ros2 It's still faster
The official documents are still very detailed ：
（foxy）https://docs.ros.org/en/foxy/Installation/Ubuntu-Install-Debians.html
（eloquent）https://docs.ros.org/en/eloquent/index.html#

Pay a little attention to the following ：
1、.bashrc in ros The path needs to be changed , my noetic Need to change to foxy（ubuntu20.04）
2、colcon It doesn't seem to help install , Self installation required sudo apt-get install python3-colcon-common-extensions