title: Regex with find command in bash
body: <p>I have been trying to use regex with find command in bash. Following are my codes:</p>
  
  <pre><code>find . -regextype posix-extended -regex 'AB[0-9]{1}_all_chr\.gz'
  </code></pre>
  
  <p>However, above code did not match to desired file with id such as "AB1_all_chr.gz" and "AB2_all_chr.gz". can someone help me out with this piece of code? </p>