SSH - Secure Shell

What is SSH ?

The Secure Shell Protocol is a cryptographic network protocol for operating network services securely over an unsecured network.

SSH, also known as Secure Shell or Secure Socket Shell, is a network protocol that gives users, particularly system administrators, a secure way to access a computer over an unsecured network.

Who created SSH?

Tatu Ylönen, in 1995 from Finland.

SSH is a network protocol that gives users, particularly system administrators, a secure way to access a computer over an unsecured network.

SSH implementation comes with scp utility for remote file transfer that utilises SSH protocol. SSH for file transfer is also utilised by other applications such as sftp and rsync which can make use of SSH to secure its network transaction.

What is ssh key?

Essentially, SSH keys are an authentication method used to gain access to an encrypted connection between systems and then ultimately use that connection to manage the remote system

Check ssh version

ssh -V

SSH Key Generation

ssh-keygen -t -b 4086 -C "mateors github account"

What is eval?

eval is a built-in Linux command which is used to execute arguments as a shell command.

Start your ssh-agent

eval $(ssh-agent -s)

Check SSH Identity

ssh-add -l

Check public key

ls ~/.ssh cat ~/.ssh/id_rsa.pub

Copy the public key

clip < ~/.ssh/id_rsa.pub

Paste the clipboard into github following address

location-> https://github.com/settings/ssh/new

To Verify Authentication

ssh -T git@github.com

To change the passpharse

ssh-keygen -p

Delete single named private key from ssh-agent

ssh-add -d ~/.ssh/id_rsa

Remove ALL private keys from the ssh-agent

ssh-add -D

This is a test line added from the client machine

Reference:

• Windows Installation