What does 'ASCII text' mean?

That's a great question!

ASCII stands for American Standard Code for Information Interchange. In simple terms, "ASCII text" means the file contains only basic, human-readable characters like:

• Letters: a-z, A-Z
• Numbers: 0-9
• Symbols: @, #, $, %, etc.
• Control characters: Like "newline" (to start a new line) or "tab."

Why is this important in Linux?

1. Human Readable: Because it is ASCII text, you can open it with any text editor (like vim or nano) or display it on your screen with commands like cat /etc/passwd, and it will look like normal words and numbers.
2. Compatibility: ASCII is a universal standard. Almost every computer system in the world can understand it.
3. The Opposite: The opposite would be a Binary file (like the /bin/bash you are about to check). If you tried to read a binary file with a text viewer, it would look like gibberish or "garbage" characters because it's meant for the computer's processor to read, not humans.

In summary: If the file command says something is "ASCII text," it tells you: "You can safely open and read this file's contents!"

Ready to see the difference? Try running file /bin/bash to see what a non-text file looks like!