title: What is the password for root@localhost's password?
body: <p>I'm configuring the hadoop 2.7.3 on windows ubuntu subsystem. I used <code>root</code> as the root account password, but when I try to run /bin/start-yarn.sh, I was required to input the password for root@localhost</p>
  
  <pre><code>lizhi@localhost's password:
  </code></pre>
  
  <p>I have tried root for this, but never worked.</p>
  
  <p>I have also tried </p>
  
  <pre><code>ssh-genkey 
  cat /home/user/.ssh/id_rsa.pub &gt;&gt; /root/.ssh/authorized_keys
  </code></pre>
  
  <p>But it still required a password when calling ./start-yarn.sh, what is the password for this, why is it different with root account password?</p>
  
  <p>I've tried to change password to root using passwd, and I still get denied:</p>
  
  <pre><code>C:\Users\lizhi&gt;bash
  lizhi@LAPTOP-SURFACEP:/mnt/c/Users/lizhi$ sudo su
  [sudo] password for lizhi:
  root@LAPTOP-SURFACEP:/mnt/c/Users/lizhi# passwd
  Enter new UNIX password:
  Retype new UNIX password:
  passwd: password updated successfully
  root@LAPTOP-SURFACEP:/mnt/c/Users/lizhi# ssh localhost
  root@localhost's password:
  Permission denied, please try again.
  root@localhost's password:
  Permission denied, please try again.
  root@localhost's password:
  Received disconnect from 127.0.0.1: 14:
  root@LAPTOP-SURFACEP:/mnt/c/Users/lizhi#
  </code></pre>
  
  <p>Welcome for any advise.</p>