I have been wondering is there a way that I can copy a rsa public key to a server in one command.

I can do this

ssh 192.168.1.220 mkdir -m 700 ~/.ssh

rsync /home/aaa/.ssh/id_rsa.pub [email protected] <mailto:john@calso>:.ssh/authorized_keys


but it means I have to log in twice.
rsync has got --chmod but I am not to sure how to use it to only change the .ssh dir

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