title: Some main commands not found in MSYS2 after update-core
body: <h1>Issue</h1>
  
  <p>Some main commands not found in MSYS2 after <code>update-core</code>.</p>
  
  <h1>Environment</h1>
  
  <ul>
  <li>Windows 8.1 64bit</li>
  <li>msys2-x86_64-20150916</li>
  </ul>
  
  <h1>Detail</h1>
  
  <p>I introduced MSYS2 to my computer and performed update-core. However, after the update, when I type <code>pacman</code> or <code>update-core</code>, the terminal says <code>bash: pacman: command not found</code>. I rebooted MSYS2 and tried the same process but the result was the same. I re-installed MSYS2 and tried the same process but the result was the same. I'd like to get things right but don't know how.</p>
  
  <p>Any suggestion would be appreciated. Thanks.</p>