title: How to ssh to localhost without password?
body: <p>EDIT: Putting exactly what was done</p>
  
  <p>I need to SSH localhost without password, the usual way of doing it (with public keys) do not work.</p>
  
  <pre><code>user@PC:~$ rm -rf .ssh/*
  user@PC:~$ ssh-keygen -t rsa &gt; /dev/null 
  Enter file in which to save the key (/home/user/.ssh/id_rsa): 
  Enter passphrase (empty for no passphrase): 
  Enter same passphrase again: 
  user@PC:~$ ls .ssh/
  id_rsa  id_rsa.pub
  user@PC:~$ ssh-copy-id -i localhost 
  The authenticity of host 'localhost (::1)' can't be established.
  RSA key fingerprint is f7:87:b5:4e:31:a1:72:11:8e:5f:d2:61:bd:b3:40:1a.
  Are you sure you want to continue connecting (yes/no)? yes
  Warning: Permanently added 'localhost' (RSA) to the list of known hosts.
  user@localhost's password: 
  Now try logging into the machine, with "ssh 'localhost'", and check in:
  
    .ssh/authorized_keys
  
  to make sure we haven't added extra keys that you weren't expecting.
  
  user@PC:~$ ssh-agent $SHELL
  user@PC:~$ ssh-add -L
  The agent has no identities.
  user@PC:~$ ssh-add 
  Identity added: /home/user/.ssh/id_rsa (/home/user/.ssh/id_rsa)
  user@PC:~$ ssh-add -L
  ssh-rsa ...MY KEY HERE
  
  user@PC:~$ ssh-copy-id -i localhost 
  user@localhost's password: 
  Now try logging into the machine, with "ssh 'localhost'", and check in:
  
    .ssh/authorized_keys
  
  to make sure we haven't added extra keys that you weren't expecting.
  
  user@PC:~$ ssh localhost echo 'testing'
  user@localhost's password: 
  
  user@PC:~$ 
  </code></pre>
  
  <p>So as you can see in the last command it is still asking the password!
  How can I fix that? Ubuntu-10.04, OpenSSH_5.3p1</p>
  
  <p>EDIT2:</p>
  
  <p>Adding some info about the sshd</p>
  
  <pre><code>user@PC:~$ cat /etc/ssh/sshd_config | grep Authentication
  # Authentication:
  RSAAuthentication yes
  PubkeyAuthentication yes
  RhostsRSAAuthentication no
  HostbasedAuthentication no
  # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication
  ChallengeResponseAuthentication no
  # PasswordAuthentication yes
  </code></pre>
  
  <p>EDIT3: Ading result from $ssh -vv localhost</p>
  
  <pre><code>$ssh -vv localhost
  ...
  debug1: Authentications that can continue: publickey,password
  debug1: Next authentication method: publickey
  debug1: Trying private key: /home/user/.ssh/identity
  debug1: Offering public key: /home/user/.ssh/id_rsa
  debug2: we sent a publickey packet, wait for reply
  debug1: Authentications that can continue: publickey,password
  debug1: Trying private key: /home/user/.ssh/id_dsa
  debug2: we did not send a packet, disable method
  debug1: Next authentication method: password
  user@localhost's password: 
  </code></pre>