![]() ![]() The utility will connect to the account on the remote host using the password you provided. Type in the password (your typing will not be displayed for security purposes) and press ENTER. usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed - if you are prompted now it is to install the new password: usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed When it finds the key, it will prompt you for the password of the remote user's account: Next, the utility will scan your local account for the id_rsa.pub key that we created earlier. This will happen the first time you connect to a new host. This just means that your local computer does not recognize the remote host. The syntax is: ssh-copy-id may see the following message: This is the account to which your public SSH key will be copied. To use the utility, you need only specify the remote host that you would like to connect to and the user account that you have password SSH access to. For this method to work, you must already have password-based SSH access to your server. The ssh-copy-id tool is included by default in many operating systems, so you may have it available on your local system. Copying your Public Key Using ssh-copy-id If you do not have ssh-copy-id available to you on your client machine, you may use one of the two alternate methods provided in this section (copying via password-based SSH, or manually copying the key). Due to its simplicity, this method is highly recommended if available. The quickest way to copy your public key to the CentOS host is to use a utility called ssh-copy-id. Step 2 - Copy the Public Key to CentOS Server The next step is to place the public key on your server so that you can use SSH-key-based authentication to log in. You now have a public and private key that you can use to authenticate. ![]() Your identification has been saved in /your_home/.ssh/id_rsa. You should then see the following output: A passphrase adds an additional layer of security to prevent unauthorized users from logging in. Here you optionally may enter a secure passphrase, which is highly recommended. You should then see the following prompt:Įnter passphrase (empty for no passphrase): Be very careful when selecting yes, as this is a destructive process that cannot be reversed. If you choose to overwrite the key on disk, you will not be able to authenticate using the previous key anymore. home/your_home/.ssh/id_rsa already exists. If you had previously generated an SSH key pair, you may see the following prompt: ssh/ subdirectory in your home directory, or specify an alternate path. Press ENTER to save the key pair into the. The first step is to create a key pair on the client machine (usually your computer): ssh-keygenīy default, ssh-keygen will create a 2048-bit RSA key pair, which is secure enough for most use cases (you may optionally pass in the -b 4096 flag to create a larger 4096-bit key).Īfter entering the command, you should see the following prompt:Įnter file in which to save the key (/your_home/.ssh/id_rsa): SSH keys provide a straightforward, secure way of logging into your server and are recommended for all users. In this guide, we'll focus on setting up SSH keys for a vanilla CentOS 7 installation. When working with a CentOS server, chances are, you will spend most of your time in a terminal session connected to your server through SSH. Secure shell, or SSH, is an encrypted protocol used to administer and communicate with servers. ![]()
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