Frequently Asked Question

When creating a Linux server, DigitalOcean gives you two ways to log in:

1. Password Authentication
2. SSH Key Authentication

While both methods allow you to access your server, SSH keys are considered the more secure option and are widely used by Linux administrators and cloud engineers.

What Is an SSH Key?

An SSH key is a pair of cryptographic files that work together to verify your identity.

The pair consists of:

Private Key

Stored on your computer.

• Never shared
• Used to prove your identity
• Similar to a house key

Public Key

Stored on the server.

• Safe to share
• Used to verify the private key
• Similar to a lock on a door

When you connect to your server, the server checks whether your private key matches the public key it has on file.

If they match, access is granted.

Why Not Just Use a Password?

Passwords can be:

• Guessed
• Stolen
• Reused
• Targeted by automated attacks

SSH keys are significantly harder to compromise because there is no password for an attacker to guess.

Many organizations disable password logins entirely and require SSH keys for all server access.

Why Did I Use an SSH Key?

For this challenge, I chose to use an SSH key because:

• It follows industry best practices
• It provides stronger security
• It allows passwordless logins
• It gives students exposure to a technology commonly used in real-world environments

Learning SSH keys early helps build habits that will be useful when managing Linux servers professionally.

What Happens If I Lose My SSH Key?

This is one of the most important things to understand.

Your private key is your access credential.

If you lose it and do not have another way to access the server:

• You may be locked out
• Recovery can be difficult
• You may need to use cloud provider recovery tools

For this reason, administrators typically:

• Back up their keys
• Store them securely
• Use password managers when appropriate
• Create additional administrative accounts

Should Beginners Use SSH Keys?

Yes.

Although SSH keys can seem intimidating at first, learning them early provides valuable experience with:

• Linux administration
• Cloud computing
• Security best practices
• Remote server management

Most cloud providers—including DigitalOcean, AWS, Azure, and Google Cloud—support or recommend SSH key authentication.

Key Takeaway

SSH keys are the preferred method of accessing Linux servers because they provide stronger security than traditional passwords.

Even if you're just starting your Linux journey, learning how SSH keys work will help you develop the same habits and skills used by professional system administrators, cloud engineers, and cybersecurity professionals.