Passwordless auth task , where did I go wrong

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but for passwordless auth you have to follow following steps
ssh-keygen -t rsa
ssh tony@ mkdir -p .ssh
cat /home/thor/.ssh/ | ssh tony@ ‘cat >> .ssh/authorized_keys’
ssh tony@ “chmod 700 .ssh; chmod 640
ssh tony@

Hello, @Olu
I think this task is to perform in the all app server ? is it?