The background is that I have a lot of downloaded tools needed to be added to PATH. I found there is not a convenient way to do this.
So I tried to learn Shell by myself and make a small tool to achieve this.
During the process, I learned how to get to know terms of Shell by reading manual pages and got in touch with a lot of Shell commands that I didn’t frequently used before, such as chsh, chmod, touch, export and source etc.
Before a long time, I have mentioned that I want to get to know how export and source works when I built my blog by Hugo. This time I have a deeper understand of that because only with that I can make my tool works as my expectation.