![]() The generated key can be copied to the remote system in order to use passwordless authentication or key-based authentication without typing the password again and again. $ ssh-keygen -b 4096 -t ecdsa Copy SSH Key Remote Server For Passwordless Login In the following examples, we generate 4096-bit RSA and ECDSA keys using the ssh-keygen command. The SSH key size parameter can be also used with the key type parameter like below. ![]() We can also create 4096 bit SSH key by using the -b option and specifying the size as 4096. The size of the key sets the security of the communication but a higher key size means more security and less performance. $ ssh-keygen -t ecdsa Generate 4096 Bit SSH Keyīy default, the key size is 2048. The ssh-keygen command can be used to create the ECDSA SSH key by providing the -t option with the ecdsa parameter like below. $ ssh-keygen -t rsa Generate DSA SSH KeyĮCDSA is another popular cryptographic protocol that is used as an SSH key type. The -t option is used with the rsa parameter like below. The RSA is the default key type which is generated automatically but you can also specify this key type explicitly if it does not default in your case. The ssh-keygen can be used to generate different types of keys like ECDSA, RSA, etc. “ Your public key has been saved in /home/ismail/.ssh/id_rsa.pub” is the Public SSH key location and name.“ Your identification has been saved in /home/ismail/.ssh/id_rsa” is the Private SSH key location and name.If you have disk encryption do not use it and provide a password. “ Enter passphrase (empty for no passphrase):” ask password to encrypt generated keys which will be more secure but a bit less practical.“ Enter file in which to save the key (/home/ismail/.ssh/id_rsa):” ask the location where the SSH keys are saved.SHA256:5oS6IpD7+2vP7LR0C4SAdJonOAPhdhDzDbNYK1IjxLo key's randomart image is: Your public key has been saved in /home/ismail/.ssh/id_rsa.pub Your identification has been saved in /home/ismail/.ssh/id_rsa Generating public/private rsa key pair.Įnter file in which to save the key (/home/ismail/.ssh/id_rsa):Įnter passphrase (empty for no passphrase): When this command is executed the SSH key generation process will start and ask us some questions about the keys like below. The following command will generate the Public and Private SSH key pair. The ssh-keygen command will create both of these keys. The keys are related to each other and the data encrypted with the Public Key can be decrypted with its Private Key. SSH uses 2 keys called Public Key and Private Key. Then the terminal is opened it will provide you the command prompt with your computer name and user name. In order to open the terminal follow these steps. Open TerminalĪs the ssh-keygen is a command-line tool we will first open the command line interface which is provided via terminal. In this tutorial, we will learn how to create different types and sizes of SSH keys in MacOSX for passwordless authentication and login for SSH. SSH keys are used to authenticate remote systems without a password. MacOSX is a Unix derivative like the Linux distributions and provides similar commands and command-line usage. ![]() Apple operating system MacOSX supports SSH as a built-in function. SSH is used to connect remote systems in a secure way via the command-line interface.
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