title: How to change the systemd timeout in centos
body: <p>The default start timeout for systemd is <code>90s</code>. I want to change it to <code>300s</code>. So I change the <code>DefaultTimeoutStartSec</code> in <code>/etc/systemd/system.conf</code></p>
  
  <pre><code># vi /etc/systemd/system.conf
  DefaultTimeoutStartSec=90s
  </code></pre>
  
  <p>But how can I make systemd reload the <code>/etc/systemd/system.conf</code>? If only change the file, the timeout does not change.</p>
  
  <pre><code># systemctl show service -p TimeoutStartUSec
  TimeoutStartUSec=1min 30s
  </code></pre>