title: Rewrite rule not working - Redirect to new url
body: <p>we moved to the new cms, there are links that need to be redirected from the old url to the new ones, wrote the revrite rule, but nothing works, in what</p>
  
  <p>Old url - site.com/1222_titlepost.html
  New url - site.com/blog/{slug} - id </p>
  
  <blockquote>
    <p>RewriteRule ^post/([0-9]{1,})_([0-9a-z]{1,}).html blog/$1 [NC,R=301,L]</p>
  </blockquote>
  
  <p>Centos 7 , apache2 , php7 , whm+cpanel</p>