title: SSh: Connection refused to localhost
body: <p>I want to install hadoop to ubuntu.</p>
  
  <p>I'm following this tutorial: <a href="http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/" rel="nofollow">Running Hadoop on Ubuntu Linux</a></p>
  
  <p>But i am facing a problem at step <code>ssh localhost</code></p>
  
  <pre><code>hduser@r:~$ ssh -vvv localhost -p 8047
  OpenSSH_6.2p2 Ubuntu-6ubuntu0.1, OpenSSL 1.0.1e 11 Feb 2013
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: /etc/ssh/ssh_config line 19: Applying options for *
  debug2: ssh_connect: needpriv 0
  debug1: Connecting to localhost [127.0.0.1] port 8047.
  debug1: connect to address 127.0.0.1 port 8047: Connection refused
  ssh: connect to host localhost port 8047: Connection refused
  
  hduser@r:~$ which ssh
  /usr/bin/ssh
  hduser@r:~$ which sshd
  hduser@r:~$ 
  </code></pre>
  
  <p>This is my /etc/ssh/sshd_config:</p>
  
  <p>last 5 lines added only!</p>
  
  <pre><code># Package generated configuration file
  # See the sshd_config(5) manpage for details
  
  # What ports, IPs and protocols we listen for
  Port 22
  # Use these options to restrict which interfaces/protocols sshd will bind to
  #ListenAddress ::
  #ListenAddress 0.0.0.0
  Protocol 2
  # HostKeys for protocol version 2
  HostKey /etc/ssh/ssh_host_rsa_key
  HostKey /etc/ssh/ssh_host_dsa_key
  HostKey /etc/ssh/ssh_host_ecdsa_key
  #Privilege Separation is turned on for security
  UsePrivilegeSeparation yes
  
  # Lifetime and size of ephemeral version 1 server key
  KeyRegenerationInterval 3600
  ServerKeyBits 768
  
  # Logging
  SyslogFacility AUTH
  LogLevel INFO
  
  # Authentication:
  LoginGraceTime 120
  PermitRootLogin yes
  StrictModes yes
  
  RSAAuthentication yes
  PubkeyAuthentication yes
  #AuthorizedKeysFile %h/.ssh/authorized_keys
  
  # Don't read the user's ~/.rhosts and ~/.shosts files
  IgnoreRhosts yes
  # For this to work you will also need host keys in /etc/ssh_known_hosts
  RhostsRSAAuthentication no
  # similar for protocol version 2
  HostbasedAuthentication no
  # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication
  #IgnoreUserKnownHosts yes
  
  # To enable empty passwords, change to yes (NOT RECOMMENDED)
  PermitEmptyPasswords no
  
  # Change to yes to enable challenge-response passwords (beware issues with
  # some PAM modules and threads)
  ChallengeResponseAuthentication no
  
  # Change to no to disable tunnelled clear text passwords
  #PasswordAuthentication yes
  
  # Kerberos options
  #KerberosAuthentication no
  #KerberosGetAFSToken no
  #KerberosOrLocalPasswd yes
  #KerberosTicketCleanup yes
  
  # GSSAPI options
  #GSSAPIAuthentication no
  #GSSAPICleanupCredentials yes
  
  X11Forwarding yes
  X11DisplayOffset 10
  PrintMotd no
  PrintLastLog yes
  TCPKeepAlive yes
  #UseLogin no
  
  #MaxStartups 10:30:60
  #Banner /etc/issue.net
  
  # Allow client to pass locale environment variables
  AcceptEnv LANG LC_*
  
  Subsystem sftp /usr/lib/openssh/sftp-server
  
  # Set this to 'yes' to enable PAM authentication, account processing,
  # and session processing. If this is enabled, PAM authentication will
  # be allowed through the ChallengeResponseAuthentication and
  # PasswordAuthentication.  Depending on your PAM configuration,
  # PAM authentication via ChallengeResponseAuthentication may bypass
  # the setting of "PermitRootLogin without-password".
  # If you just want the PAM account and session checks to run without
  # PAM authentication, then enable this but set PasswordAuthentication
  # and ChallengeResponseAuthentication to 'no'.
  UsePAM yes
  
  AllowGroups hduser
  
  
  # disable ipv6
  net.ipv6.conf.all.disable_ipv6 = 1
  net.ipv6.conf.default.disable_ipv6 = 1
  net.ipv6.conf.lo.disable_ipv6 = 1
  </code></pre>
  
  <p>thanks in advance (and also for not voting down :D ) )</p>
  
  <p>EDIT:</p>
  
  <pre><code>hduser@r:~$ r@r:~$ netstat -tulpn
  
  tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      -               
  tcp        0      0 127.0.1.1:53            0.0.0.0:*               LISTEN      -               
  tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -               
  tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      -               
  tcp        0      0 0.0.0.0:17500           0.0.0.0:*               LISTEN      -               
  udp        0      0 127.0.1.1:53            0.0.0.0:*                           -               
  udp        0      0 0.0.0.0:68              0.0.0.0:*                           -               
  udp        0      0 0.0.0.0:631             0.0.0.0:*                           -               
  udp        0      0 0.0.0.0:17500           0.0.0.0:*                           -               
  udp        0      0 0.0.0.0:5353            0.0.0.0:*                           -               
  udp        0      0 0.0.0.0:26575           0.0.0.0:*                           -               
  udp        0      0 0.0.0.0:47235           0.0.0.0:*                           -               
  -         
  </code></pre>