101 on Documentation

SSH: Agent

Wed, 27 Aug 2025 15:48:48 +0530

SSH agent is a background program that manages and storess SSH private keys for secure authentication, letting users connect to remote servers via SSH without repeatedly entering passphrase or password.

GPG: Beginner's Guide

Wed, 20 Aug 2025 12:59:29 +0530

What is GPG / PGP?

GnuPG (aka GPG) is an implementation of standard known as PGP (Pretty Good Privacy). It uses a system of “Public” and “Private” keys for the encryption and signing of message or data.

Private Key

Private keys are the first half of a GPG key which is used to decrypt messages that are encrypted using public keys.
Also used for signing messages - a way to prove that you own the key.
Obviously, you must not share the private keys anywhere.

Public Key

Public keys are the second half of a GPG key which is used to encrypt messages for the owner of private key.
It is safe to share it anywhere publicly, as it can only be used to encrypt messages for the owner of the private key. In simple terms, owning just the public key is useless unless you own the private key.

Why Use GPG?

GPG (GNU Privacy Guard) provides encryption and digital signing to:

SSH: Beginner's Guide

Tue, 19 Aug 2025 14:28:17 +0530

What is SSH?

SSH (Secure Shell) is a protocol used to securely access and manage remote systems over insecure networks. It’s widely used to log into remote Linux/Unis servers, transfers files, and run common across multiple machines.

Basic SSH Concepts

SSH Client

Software on your computer that initiates the connection Example: terminal, Konsole, PuTTY, & more.

SSH Server

The remote computer you want to access; It listens for incoming SSH request and process them accordingly.