How to create RSA key

To create an RSA key with a length of 4096 using `ssh-keygen` and the `-f` parameter, follow these steps:

  1. Open a terminal or command prompt.
  2. Run the following command:
    3. ssh-keygen -t rsa -b 4096 -C "[email protected]" -f id_rsa

    This command generates a new RSA key pair with a length of 4096 bits and saves it to a file named `id_rsa`.

  3. You will be prompted to enter a passphrase for the key. You can choose to enter a passphrase or leave it blank for no passphrase.
  4. Once the key pair is generated, you will see the following output:
    5. Generating public/private rsa key pair.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in id_rsa.
Your public key has been saved in id_rsa.pub.
The key fingerprint is:
SHA256:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
The key's randomart image is:
+---[RSA 4096]----+
|                 |
|                 |
|                 |
|        . .      |
|       . S .     |
|      . + +      |
|     . = =       |
|    . + o .      |
|   . o oEo.      |
+----[SHA256]-----+

    The private key is saved in the file `id_rsa`, and the public key is saved in the file `id_rsa.pub`.