Passwordless ssh authentication fails

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http://www.unix.com – Unable to set ssh passwordless authentication I am unable to ssh with passwordless authentication from Windows client onto UBuntu server. The ssh version on UBuntu is OpenSSH_5.8p1 Debian-7ubuntu1, OpenSSL 1.0.0e , while SSH on Windows Client is OpenSSH_5.1p1, OpenSSL 0.9.8k. I turned on ssh debugging and noticed these messages on server and client: Code: /usr/bin/sshd -d -p 2222 on server: adminuser@server:~/.ssh$ /usr/sbin/sshd -d -p 2222 debug1: sshd version OpenSSH_5.8p1 Debian-7ubuntu1 debug1: could not open key file '/etc/ssh/ssh_host_rsa_key': Permission denied Could not load hos (HowTos)