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passwordless ssh to remote system as root [closed]

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linux-howto

http://stackoverflow.com – I need to ssh (as root) to a remote server and perform some root level operations. I will be sshing from a local server where I don't have root privileges. Given this option, is it possible to perform passwordless ssh to remote system using (rsa) keys ? Local and remote servers run linux. BTW, I generated keys (ssh-keygen -t rsa) on the local server. Copied the public key to remote server's .ssh/authorized_keys file. However it still keeps prompting for password. The same setup works fine, if the local and remote username (non-root) matches. (HowTos)