Step Snap 1 [SSH]:

SSH (Secure Shell) is like a secure tunnel in the internet world, similar to how we need keys to open our front door - SSH enables us to safely access remote servers.

Core SSH Functions:

• Secure remote server login
• Encrypted file transfer
• Remote command execution

SSH Key Authentication Using asymmetric encryption, two keys are generated:

• Private key: Your personal key, stored locally, must remain confidential
• Public key: Shareable lock, placed on servers

When we execute:

ssh-keygen -t rsa -f gcp -C yedan -b 2048

Each component serves a specific purpose:

• t rsa: Selects RSA encryption algorithm, one of the most reliable encryption methods
• f gcp: Specifies the key file name
• C yedan: Adds an identifier for management
• b 2048: Sets key length, higher numbers mean more security

.ssh Directory Analysis Windows and Unix/Linux systems have a .ssh folder in the user directory, containing:

• known_hosts: Records trusted servers
• config: SSH configuration file
• id_rsa/id_rsa.pub: Default key pair names