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Quickly Add Your Public Key To An Authorized Keys File

09.22.2006
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        This will add your public ssh key to an authorized keys file on a remote server for passwordless login.
Change id_dsa.pub to wherever you stored your public key from ssh-keygen.

ssh user@host 'mkdir ~/.ssh;echo '`cat ~/.ssh/id_dsa.pub`' >> ~/.ssh/authorized_keys'