OS: SLES 11 SP 4 We have the following problem: We want to establish a ssh connection between 2 SLES machines for some users without password. Normally it works without a problem, but with 2 new users it does not work. What we did is the following: as user a on machine A: a@A> ssh-keygen -t rsa no passphrase a@A> cat ~/.ssh/id_rsa.pub | ssh a@B 'cat >> .ssh/authorized_keys' We use the local /etc/password, the output of "id a" is identical on both machines. The same procedure is successful for user c, but not for a and b. Where should I search for differences between a, b and c? Thanks in advance! Regards Burkhard