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LAB 1: SSH KEY SETUP

🎯 Objektif

Setup SSH authentication untuk GitHub account anda.

📋 Prerequisites

  • GitHub account (daftar di github.com jika belum ada)
  • Git installed di komputer
  • Terminal/Command Prompt access

📝 Steps

Step 1: Generate SSH Key

Buka terminal/command prompt dan run:

ssh-keygen -t ed25519 -C "[email protected]"

Gantikan [email protected] dengan email GitHub anda.

Nota: Jika system anda tak support ed25519, guna:

ssh-keygen -t rsa -b 4096 -C "[email protected]"

Sistem akan tanya:

  1. Enter file in which to save the key:

    Press ENTER (guna default location)

  2. Enter passphrase (optional):

    Press ENTER untuk kosongkan ATAU
Taip password untuk extra security

Output yang anda patut nampak:

Your identification has been saved in /Users/username/.ssh/id_ed25519
Your public key has been saved in /Users/username/.ssh/id_ed25519.pub
The key fingerprint is:
SHA256:xxxxxxxxxxxxxxxxxxxxxxxxxxx [email protected]

Step 2: Copy Public Key

Windows (Git Bash):

cat ~/.ssh/id_ed25519.pub | clip

Windows (PowerShell):

Get-Content ~/.ssh/id_ed25519.pub | Set-Clipboard

macOS:

pbcopy < ~/.ssh/id_ed25519.pub

Linux:

cat ~/.ssh/id_ed25519.pub
# Copy output manually (Ctrl+Shift+C)

Output akan nampak macam ni:

ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJl3dIeudNqd0PTOXT... [email protected]

Step 3: Add to GitHub

  1. Pergi ke GitHub:

    • Login → Click avatar (top right) → Settings

  2. Navigate to SSH Keys:

    • Sidebar kiri → SSH and GPG keys

  3. Add New Key:

    • Click "New SSH key" (button hijau)

  4. Fill Form:

    • Title: Laptop [Nama Anda] (contoh: "Laptop Ahmad")
    • Key type: Authentication Key (default)
    • Key: Paste public key yang tadi copy

  5. Save:

    • Click "Add SSH key"
    • Confirm dengan password GitHub anda

Step 4: Test Connection

ssh -T [email protected]

First time connect, sistem akan tanya:

Are you sure you want to continue connecting (yes/no/fingerprint)?

Taip: yes dan press ENTER

✅ Success output:

Hi username! You've successfully authenticated, but GitHub does not provide shell access.

❌ Jika gagal:

# Test dengan verbose
ssh -T [email protected] -v

✅ Lab 1 Checklist

  • SSH key generated successfully
  • Key added to SSH agent
  • Public key added to GitHub
  • Connection test successful
  • Received "Hi username!" message