The difference between `cat` and `less`

cat (Concatenate and Display Files):

The cat command outputs the entire contents of a file at once. For example, if you type cat test.txt, the full content of test.txt will be displayed on the screen immediately. If the file is long, the screen will scroll quickly to show all the content.

less:

The less command displays the contents of a file one screen at a time. For example, if you type less test.txt, the content of test.txt will be shown one page at a time. You can then use the spacebar or arrow keys to navigate through the file page by page.