IT Glossary & Dictionary

11 terms covering Linux, Python, DevOps, Networking, Databases, and more.

Clear definitions and in-depth explanations for beginners and professionals.

All Cloud Computing (35) Databases (51) DevOps (60) Linux (60) Networking (46) Programming Concepts (40) Python (55) Security (40) Web Development (53)

A-Z: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Clear

S

Sed

Linux

A stream editor for filtering and transforming text, commonly used for find-and-replace operations in files.

SELinux

Linux

Security-Enhanced Linux — a mandatory access control system that confines programs to minimum required privileges beyond standard file permissions.

Shell

Linux

A command-line interface that interprets user commands and passes them to the operating system for execution.

SSH (Secure Shell)

Linux

A cryptographic network protocol for secure remote login and command execution over an unsecured network.

Strace

Linux

A diagnostic tool that traces system calls and signals made by a process, useful for debugging and performance analysis.

Swap Space

Linux

A portion of disk storage used as virtual memory when physical RAM is fully utilized.

Symbolic Link

Linux

A special file that acts as a shortcut pointing to another file or directory in the filesystem.

Sysfs (/sys)

Linux

A virtual filesystem that exports information about kernel subsystems, hardware devices, and device drivers in a structured hierarchy.

Systemctl

Linux

The primary command for managing systemd services, including starting, stopping, enabling, and checking service status.

Systemd

Linux

A system and service manager for Linux that initializes the system and manages services, logging, and more.

Systemd Timer

Linux

A systemd unit that triggers services on a schedule or at specific events, serving as a modern alternative to cron jobs.

How Our IT Glossary Helps You

More than just definitions — our glossary is a learning tool that connects concepts to practical resources.

📚 Clear Definitions

Every term has a short definition for quick reference and a detailed explanation for deeper understanding.

🎯 Difficulty Levels

Each term is tagged as Beginner, Intermediate, or Advanced so you know if it matches your current knowledge.

🔗 Linked to eBooks

Terms link to relevant eBooks so you can go from a quick definition to in-depth learning in one click.

🔭 9 Categories

Browse by topic area — filter by category and A-Z letter to find exactly what you need in seconds.

Browse All Books Reading Lists Read Our Blog

Frequently Asked Questions

What is the Dargslan IT Glossary?

The Dargslan IT Glossary is a comprehensive dictionary of 11 information technology terms covering 9 categories including Cloud Computing, Databases, DevOps, Linux, Networking, Programming Concepts. Each term includes a clear definition, an in-depth explanation, difficulty level, and links to related eBooks for further learning.

How many terms does the glossary contain?

The glossary currently contains 11 terms across 9 categories. We regularly add new terms to keep the glossary current with the latest technologies and concepts.

Who is this glossary for?

The glossary is designed for anyone working in or learning about IT — from complete beginners encountering unfamiliar terms to experienced professionals looking for precise definitions. Each term includes a difficulty badge (Beginner, Intermediate, or Advanced) so you can find content at your level.

Can I browse terms by category?

Yes. Use the category pills at the top of the glossary to filter terms by topic such as Cloud Computing, Databases, DevOps, Linux, Networking, Programming Concepts. You can also use the A-Z letter filter to jump to terms starting with a specific letter, or combine both filters.

How are glossary terms linked to eBooks?

Many glossary terms are linked to relevant eBooks in our store. When you read a term definition, you will see recommended books that cover that topic in depth — making it easy to go from a quick definition to comprehensive learning.

Is the glossary free to use?

Yes, the entire IT glossary is completely free. Browse, read, and learn from all 11 terms without any registration or payment required.

How do I find a specific term?

You can use the A-Z letter navigation to jump to terms starting with a specific letter, filter by category to narrow results, or use the search bar in the header to find any term by name. Each term has its own dedicated page with a full explanation.