title: I tried to reinstall MySQL on centos and now it doesn't start
body: <p>I tried to reinstall MySQL and now it doesn't even start, and if I go to "messages" it says this</p>
  
  <pre><code>Jul 23 11:04:27 systemd: Starting MySQL Server...
  Jul 23 11:04:29 systemd: mysqld.service: main process exited, code=exited, status=1/FAILURE
  Jul 23 11:04:29 systemd: Failed to start MySQL Server.
  Jul 23 11:04:29 systemd: Unit mysqld.service entered failed state.
  Jul 23 11:04:29 systemd: mysqld.service failed.
  </code></pre>