How to configure SSH for a passwordless login into your remote machine

• On local machine, run

ssh-keygen

• This creates two files /.ssh/id_rsa.pub (public key) and /.ssh/id_rsa (private key).
• Still on local machine, run

ssh-copy-id remoteusername@remoteserver

• This copies your public key to remote server.
• Now try doing ssh to remote machine, no password should be required.

if ssh-copy-id fails

Sometimes, ssh-copy-id gives an error and doesn’t copy the files. In that case, use this one liner but replace the remoteuser and servername:

cat ~/.ssh/id_rsa.pub | ssh remoteusername@remoteserver "mkdir -p ~/.ssh && chmod 700 ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys"

Ensure

• Remote machine is running sshd.
• Local machine has relevant terminal with ssh installed.

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