What is the password for root@localhost's password?
<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>