datatransfer through ssh without password

http://mah.everybody.org/docs/ssh
http://www.securitydocs.com/library/3385
steps

soure server
ssh-keygen -t rsa
scp /root/.ssh/id_rsa.pub root@destination:/root/.ssh/authorized_keys2

destination server
cd /root/.ssh
ssh-keygen -t rsa
cat id_rsa.pub >> authorized_keys2
chmod 600 authorized_keys2

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Now you can connect from source server to destination server without password