How to use wildcards?

Wildcards are used in Linux to match filenames or patterns in commands. Here are some common wildcards and how to use them:

1. * (Asterisk): Matches zero or more characters.

   • Example: ls *.txt lists all files with a .txt extension.

2. ? (Question Mark): Matches exactly one character.

   • Example: ls file?.txt matches file1.txt, fileA.txt, but not file.txt.

3. [abc]: Matches any one character specified within the brackets.

   • Example: ls file[abc].txt matches filea.txt, fileb.txt, and filec.txt.

4. [a-z]: Matches any one character in the specified range.

   • Example: ls file[0-9].txt matches file1.txt, file2.txt, etc.

5. {} (Braces): Matches any of the comma-separated patterns within the braces.

   • Example: ls file{1,2,3}.txt matches file1.txt, file2.txt, and file3.txt.

You can use these wildcards in various commands like ls, cp, mv, and rm to perform operations on multiple files that match the specified patterns.