title: How do I push files to my root ( / ) directory with ADB so I can install the `su` binary
body: <p>I've just <code>adb shell</code>'d into my root directory on my device and I want to install the <code>su</code> binary. Just to note, I'm on macOS and want to do this manually.</p>
  <p>When I try to push the <code>su</code> binary to the root directory (not on SDCard), I get this error:</p>
  <pre><code>$ cp /sdcard/su /system/bin
  cp: /system/su: Read-only file system
  </code></pre>
  <p>How do I push the <code>su</code> binary to <code>/system/bin</code>?</p>
  <p>(My tablet is an Acer Iconia Tab 10 A3-A30)</p>
  <p>Basically, I just want to root it but I can't find any details on unlocking the bootloader or any apps that work with this tablet.</p>