Create a permanent connection between two servers

You may face that you want to make a permenant connection between two servers, there is a command to make that in such a one line


cat ~/.ssh/ | ssh username@ipaddress "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 700 .ssh; chmod 640 .ssh/authorized_keys"


for the chmod permission at the end some servers need the permission to be added to the .ssh server so we can access it from other server

we give the folder .ssh permission of 700 and the authorized_key permission 640

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