About SSH

SSH, or Secure Shell, is a remote management protocol that allows users to control and organize their servers over the internet. SSH was created as a secure replacement for unencrypted Telnet.

SSH uses encryption technique to ensure that all communications to & from the remote server are encrypted. It provides a mechanism to authenticate a remote user, transfer inputs from the client to the host, and send the output back to the client.

As you know, we often use the git version control system when submitting projects to Github. It asks us for username and password every time we commit. After these steps, you will now be able to push without the need for a username and password.

If you don't have any SSH keys or want to check if they exist

Checking for existing SSH keys

If you want to create new SSH keys

Generating a new SSH key

or you could use generate-and-add-ed25519.sh and generate-and-add-rsi.sh scripts which creates ssh key and adds to the ssh agent.

Generate key and add to Github

Both of the script files generates ssh key and adds your ssh key to ssh-agent. After that it's not necessary to enter your passphrase every time you use your SSH key

Both of the script files generates ssh key without passphrase and saves your ssh key to default ssh file path ~/.ssh/ . If you want to use passphrase or save ssh file to another path, follow the Generating a new SSH key instructions.

If you want to generate a new SSH key with rsi algorithm, you could use generate-and-add-rsi.sh .
If you want to generate a new SSH key with rsi algorithm, you could use generate-and-add-ed25519.sh .
Both of the script files has same instructions.

Step 1

Open Terminal.
Enter following command in your repository which you downloaded script with your e-mail address..
```
  $ sh generate-and-add-ed25519.sh cem.altuner@kloia.com
```
Script will save the file with supported format by gihub to default ssh file path ~/.ssh/ .
If you have same file name with "id_ed25519" or "id_rsi" in your default ssh file path, terminal asks you for Overwrite (y/n). Be careful and don't overwrite your own ssh file which you don't want to delete.
```
  >Agent pid 84773
  >Identitiy added: /home/cem/.ssh/id_ed25519 (cem.altuner@kloia.com)
```

Step 2

Copy following key to clipboard

Step 3

In the upper-right corner of any page, click your profile photo, then click Settings.

Step 4

In the user settings sidebar, click SSH and GPG keys.

Step 5

Click New SSH key.

Step 6

Add a label to "Title" field. Paste your key into the "Key" field and press Add SSH Key Button.

You could check you connection wit ssh -T git@github.com

    $ ssh -T git@github.com
    >Please type 'yes', 'no' or the fingerprint: yes
    >Warning: Permanently added 'github.com,140.82.121.4' (RSA) to the list of known hosts.
    >Hi cem-altuner-kloia! You've successfully authenticated, but GitHub does not provide shell access.

cem-altuner / ssh