The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter. Introduction to Linux - A Hands on Guide This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter. Linux 101 Hacks. 7 UNIX / Linux ssh-keygen Command Examples (Private and Public Key Management for SSH) by Ramesh. Ssh-keygen generates, manages and converts the authentication keys (private and public keys) used by SSH. You can generate both RSA. The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.

1. Ssh Keygen Manual
2. Linux Keygen Command
3. Keygen Linux Git
4. Linux Ssh Keygen Example

Ssh is a secure and popular protocol for managing different type of IT devices like Linux systems, Network devices etc. What makes ssh secure is the encryption of the network traffic. Network traffic is encrypted with different type of encryption algorithms. There is also user authentication done with encryption algorithms. These algorithms needs keys to operate. Keys are generally produced with auxiliary tools. ssh-keygen is defacto tool used by ssh and other applications to create different type of keys. In this tutorial we will look how it works.

We will look some terms and concepts about public cryptography in this part. In public cryptography there is two keys. These keys are called public and private. Public keys are known by others to create encrypted data. Private keys are only known by its owner. Data are encrypted by public keys by anyone but only the private key owner can decrypt the message. So keeping private key is important. ssh-keygen is used to create different type of public-private keys.

There are some configurations files those used by ssh. We will look the public private keys related configuration files.

• ~/.ssh/identity.pub contains the protocol version 1 RSA public key
• ~/.ssh/id_dsa contains the protocol version 2 DSA authentication identity of the user.
• ~/.ssh/id_dsa.pub contains the protocol version 2 DSA public key for authentication
• ~/.ssh/id_rsa contains the protocol version 2 RSA authentication identity of the user
• ~/.ssh/id_rsa.pub contains the protocol version 2 RSA public key for authentication

Generating key without any parameter is very easy. This will generate with default values and options a key. This will take 3 step just enter after issuing the sshkeygen command.

I want to make use of the updated version of ssh-keygen because that includes a hashing feature for fingerprints like so: ssh-keygen -E md5 -lf ~/.ssh/id_rsa.pub But my current version doesn't.

Now we will specify the path key files to be saved. We do not enter a path if we want to use default path which is ~/.ssh/id_rsa

Linux all After you've checked for existing SSH keys, you can generate a new SSH key to use for authentication, then add it to the ssh-agent. Ssh-keygen -t rsa -b 4096 -C 'your_email@example.com' This creates a new ssh key, using the provided email as a label. Add your SSH private key to the ssh-agent and store your passphrase in the. # ssh-keygen -y Enter file in which the key is (/root/.ssh/id_rsa): ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA5kSivOqhs0U9ZMN20nxFe27QZ3t0lT2zbH7OSX== You can also specify the priviate key using -f option. In this example, it will display the public key for ~/.ssh/id_dsa private key.