This is a technology based on public-key cryptography.Hello everyone. The idea is to set up your desktop/laptop so that you are recognized by our login servers without you having to enter your password every time. In the documentation below your desktop/laptop is referred to as the “local host” and our login server(s) are referred to as the “remote host”. There is a one-time setup for each of the local hosts that you want to set up with keypair authentication. linux and mac osx)įirst, on your local laptop/desktop, cd into your home directory and invoke the ssh key generator: ssh-keygen -t rsa Instructions for unix-based machines (e.g. For security reasons, we recommend that you use a passphrase to protect your key. For the other questions, you can select the default values. The key generator will put two files in the. ssh subdirectory of your home directory, i.e.
The former contains your private key while the latter contains your public key. You should only ever have to run the ssh key generator once on your local host. If you have already configured passwordless login and you run the key generator a second time, it will overwrite your previous public and private key files. This will break all password-less logins that you set up with your previous keys. Next you want to copy your public key file to the remote host and append it to the authorized_keys file in the. Ssh subdirectory of your home directory on the remote host (one of the jhpce login servers, e.g. You can perform the copy and append operations in one line as follows cat ~/.ssh/id_rsa.pub | ssh \ If there is no ~/.ssh directory in the remote host, you will need to login to the remote host and create a.
Where you replace with your JHPCE userid and where you enter your JHPCE password when you are prompted for it by ssh. To test that everything is working you should be able to log into the remote host from your local host with the following command: ssh you start ssh, you will be prompted for the passphrase that you used to protect your key. To use ssh-agent, run ssh-add (you will be prompted for the passphrase you used) To avoid having to enter your passphrase every time you use ssh, you can use the “ssh-agent” program.
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