At this point, the entire Shell programming series is coming to an end. As a summary, I will mainly review the main content of each section, and summarize some common frameworks and related precautions for Shell programming.
TODO: Mainly review the content of each section.
TODO: Summarize solutions to various common problems by analyzing some examples, such as how to ensure that each program has only one running entity (process) at the same time.
TODO: If you think more, there will always be a more concise and efficient way.
TODO: For example, be careful
rm -rf
usage, how to view system help, etc.