If you want to use a hardware security key to authenticate to GitHub, you must generate a new SSH key for your hardware security key. For more information, see " Checking for existing SSH keys." If you're unsure whether you already have an SSH key, you can check for existing keys. If you don't already have an SSH key, you must generate a new SSH key to use for authentication. The SSH agent manages your SSH keys and remembers your passphrase. If your key has a passphrase and you don't want to enter the passphrase every time you use the key, you can add your key to the SSH agent. Whenever you use the key, you must enter the passphrase. When you generate an SSH key, you can add a passphrase to further secure the key. When you connect via SSH, you authenticate using a private key file on your local machine. and there may be something about a temporary key too.You can access and write data in repositories on using SSH (Secure Shell Protocol). Well, I don't know much about that, off the top of my head, but whatever is encrypted with one key can be decrypted with the other key, and identifying yourself is a bit different to sending data. When initiating the SSH connection to B, how does A “use” its private When B "gets" this public key, where does it go or get stored? And next time you do ssh it will use the key. Instead of doing ssh you do ssh-copy-id and you are prompted for a password, you enter it, you're in, it will copy the public key over. You need to be able to ssh in, so you need password access Or you could email id_rsa.pub to an email account, then from B, B can check the email and append the contents of id_rsa.pub into his authorized_keys file Then on B, make sure ~/.ssh exists then do cat a.a > ~/.ssh/authorized_keysĪnd you can cat authorized_keys of B before and after to make sure the key is listed. Or even more manually, to break the command down Process? If automated, what’s the command?įrom A- cat ~/.ssh/id_rsa.pub | ssh "mkdir -p ~/.ssh & cat > ~/.ssh/authorized_keys" How does A “give” B its public key (id_rsa.pub)? Does this have to beĪ manual process, or can it be automated? If manual, what’s the If anything I’ve said above is incorrect or misled, please begin byīut B needs A's public key to be listed in B's authorized_keys file in order for A to be able to connect to BĪlso you can delete id_rsa.pub and ssh to B and it will still work, because the public key is generated fresh with each ssh connection and not stored in any id_rsa.pub Key (again, probably id_rsa) to make that SSH connection. Ssh-keygen-generated id_rsa.pub), and then uses its respective private Scripts running on A need to beĪble to SSH into B. As long as the private key being used matches a public key on the remote machine (in the authorized_keys file for the user's account which you are logging in to), then you will not need to supply a password. If you want to use a different private key, you can specify it in your ssh command using -i. XXX can be rsa, dsa, or any protocol for which a key was generated. There is a linux command ssh-copy-id that will copy the ID for you and put it in the file.īy default, ssh will use the file ~/.ssh/id_XXX as your private key. In order to allow passwordless login to server B, you would need to add your public key to the ~/.ssh/authorized_keys file on server B (one public key per line, there can be any number of keys in this file). Giving the public key to another host is something that the user would need to manually do, either by sending it to someone responsible for server B, or if you have an account with a password, you could log in and put it there yourself. Ssh-keygen generates both the public and private keys, which initially reside only locally.
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