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Linux Command Line Mastery · Lesson

Secure Shell Key Management

Implement passwordless SSH authentication using key pairs for enhanced security and convenience.

What are SSH Keys?

SSH keys are a secure way to log into a remote server without needing a password. Think of them as a digital key and lock system.

  • They provide stronger security than traditional passwords.
  • They offer convenience by enabling passwordless logins.
  • This lesson will guide you through setting them up.

Public and Private Key Pair

An SSH key system uses two parts: a public key and a private key.

  • Your private key stays on your local computer and must be kept secret. Never share it!
  • Your public key can be freely shared. You place it on any server you want to connect to.
  • When you try to connect, the server uses your public key to verify your private key, allowing access.

All lessons in this course

  1. Network Diagnostics: `traceroute`, `nslookup`, `dig`
  2. Firewall Management: `ufw`, `firewalld`, `iptables`
  3. Secure Shell Key Management
  4. Capturing and Inspecting Traffic with tcpdump
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