title: Read-Only File System after Upgrade Kernel under CentOS 7
body: <h1>Read-Only File System after Upgrade Kernel under CentOS 7</h1>
  
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  <p>Hi all,<br>
  &nbsp;&nbsp;&nbsp;I upgraded the kernel of CentOS 7 to <code>4.11.4</code>, and reboot the VM. After that, I cannot change anything in the system. No matter what I do, it says <code>Read-only file system</code>.<br>
  &nbsp;&nbsp;&nbsp;I want to work with the latest kernel, what's the correct way to upgrade kernel under CentOS 7 on Google Cloud Engine?<br>
  <br>&emsp;&emsp;Thank you very much!</p>