5. How to get detailed usage description of a UNIX command

To get a detailed usage description of a UNIX command, you can use the man command, which stands for "manual". Here are the steps:

1. Open your terminal.

2. Type man followed by the name of the command you want to know more about. For example, if you want to know more about the ls command, you would type man ls.

3. Press Enter.

The manual page for the command will be displayed, providing a detailed description of the command, its options, and examples of how to use it. You can navigate through the manual page using the arrow keys. To quit the manual page and return to the command line, press q.