Square Bracket Wildcards in Shell/Bash

Square brackets [] in shell wildcards define a character class, matching any single character within the brackets. This allows you to specify a range or set of characters to match in a filename or string. For example, [abc] will match either 'a', 'b', or 'c'. You can also use ranges like [a-z] to match any lowercase letter or [0-9] to match any digit. A caret ^ inside the brackets negates the character class, matching any character not listed (e.g., [^0-9] matches anything that isn't a digit).

Visit the following resources to learn more:

• @article@Standard Wildcards / Globbing Patterns in Linux
• @video@wildcards in linux | asterisk , question mark , square brackets , curly brackets , escape character