I am using ubuntu 13.10, and the server runs ubuntu 12.04. I had generate private and public keys using ssh-keygen, and put id_rsa.pub to server side and added it to authorzied_keys accordding to the method I found on the Internet.
But, I still have to input password while I am trying to login. I have set the home dir to 700, .ssh dir to 700, authorzied_keys file to 600, and I have checke sshd_config file,
and nothing happened.

The debug infomation (with -vvv option) and sshd_config is as following, and nothing listed in server's auth.log file.

I even have updated openssh-server openssh-client on both client and server side.

Is there anything else I have to do?
Thanks for any infomation.

debug3: load_hostkeys: loading entries for host "[xxx.101.15.62]:2222" from file "/home/leetom/.ssh/known_hosts"

debug3: load_hostkeys: found key type ECDSA in file /home/leetom/.ssh/known_hosts:2

debug3: load_hostkeys: loaded 1 keys

debug3: load_hostkeys: loading entries for host "[xxx.101.15.62]:2222" from file "/home/leetom/.ssh/known_hosts"

debug3: load_hostkeys: found key type ECDSA in file /home/leetom/.ssh/known_hosts:2

debug3: load_hostkeys: loaded 1 keys

debug1: Host '[xxx.101.15.62]:2222' is known and matches the ECDSA host key.

debug1: Found key in /home/leetom/.ssh/known_hosts:2

debug1: ssh_ecdsa_verify: signature correct

debug2: kex_derive_keys

debug2: set_newkeys: mode 1

debug1: SSH2_MSG_NEWKEYS sent

debug1: expecting SSH2_MSG_NEWKEYS

debug2: set_newkeys: mode 0

debug1: SSH2_MSG_NEWKEYS received

debug1: Roaming not allowed by server

debug1: SSH2_MSG_SERVICE_REQUEST sent

debug2: service_accept: ssh-userauth

debug1: SSH2_MSG_SERVICE_ACCEPT received

debug2: key: /home/leetom/.ssh/id_rsa ((nil)),

debug2: key: /home/leetom/.ssh/id_dsa ((nil)),

debug2: key: /home/leetom/.ssh/id_ecdsa ((nil)),

debug1: Authentications that can continue: publickey,password

debug3: start over, passed a different list publickey,password

debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password

debug3: authmethod_lookup publickey

debug3: remaining preferred: keyboard-interactive,password

debug3: authmethod_is_enabled publickey

debug1: Next authentication method: publickey

debug1: Trying private key: /home/leetom/.ssh/id_rsa

debug1: read PEM private key done: type RSA

debug3: sign_and_send_pubkey: RSA 68:51:b6:ed:cc:c2:54:f4:xx:15:41:d7:f5:4a:0e:da

debug2: we sent a publickey packet, wait for reply

debug1: Authentications that can continue: publickey,password

debug1: Trying private key: /home/leetom/.ssh/id_dsa

debug3: no such identity: /home/leetom/.ssh/id_dsa: No such file or directory

debug1: Trying private key: /home/leetom/.ssh/id_ecdsa

debug3: no such identity: /home/leetom/.ssh/id_ecdsa: No such file or directory

debug2: we did not send a packet, disable method

debug3: authmethod_lookup password

debug3: remaining preferred: ,password

debug3: authmethod_is_enabled password

debug1: Next authentication method: password

[email protected]'s password: 

and the sshd_config

# 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