Linux Security and Systems Administration Glossary

This glossary serves as a companion reference to our SSH, Debian, and grep comprehensive guide and advanced Linux security guide. Use it to quickly look up unfamiliar terms while learning.

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• SSH & Cryptography
• Debian Package Management
• Text Processing & Regular Expressions
• Security Concepts
• Network & System Administration

SSH & Cryptography

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A-E

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AES (Advanced Encryption Standard)

• Symmetric encryption algorithm using 128, 192, or 256-bit keys
• Hardware-accelerated on modern CPUs via AES-NI instructions
• Example: Ciphers aes256-gcm@openssh.com
• See: SSH cipher selection in our guide

Authentication Layer