How does the wildcard pattern '*.txt' match files?

The wildcard pattern *.txt matches files based on the following criteria:

Breakdown of the Pattern:

• Asterisk (*): This wildcard represents zero or more characters. It can match any sequence of characters, including none.
• .txt: This specifies that the file must end with the .txt extension.

Matching Behavior:

• The pattern *.txt will match any file name that:
  • Ends with .txt
  • Can have any characters (or none) before the .txt extension.

Examples of Matches:

• file.txt
• document.txt
• notes.txt
• myfile123.txt
• example.txt

Non-Matches:

• file.doc (does not end with .txt)
• image.png (does not end with .txt)
• text (no extension)

Usage in Commands:

You can use this pattern in commands like ls, cp, or rm to operate on all text files in a directory:

ls *.txt

This command lists all files in the current directory that have a .txt extension.

If you have any further questions or need more details, feel free to ask!