Andrei Dumitrescu

DevOps Engineer

Andrei has been a Network and Software Engineer for over 15 years which is the typical profile of a DevOps Engineer. Much of his work experience has involved providing consulting services for a wide variety of companies on DevOps and SysAdmin best practices.

These many years of experience have allowed him to gain an advanced knowledge of the Linux Operating System, the TCP/IP Protocol Stack, Terraform, Routing and Switching Protocols, Information Security best practices and much more.

Andrei also has Cisco Certifications like CCNP and CCNP Service Provider, a degree in Economic Informatics and a master's degree in Computer Science. To say Andrei loves learning would be an understatement!

He also has a passion for cryptography, encryption algorithms, and solidity programming (smart contracts). He even spent three years building a blockchain-based ecosystem for Smart Contract Security Auditing.

If that isn't enough, he is also the co-founder of Crystal Mind Academy, a Cisco Academy and professional training center that focuses on teaching cutting-edge technologies to students.

Over the last 15 years, more than 50,000 students have participated in their in-person or online training programs where Andrei has covered topics like Cisco CCNA, CCNA Security, CCNP, Linux Administration, Information Security, Python Programming, Network Automation with Python, Go (Golang) Programming and Blockchain Programming (Ethereum/Solidity).

But Andrei isn't all work and no play! When not working, he enjoys crossfit, reading, and spending time traveling with his wife and children.

Andrei has a strong belief in freedom and equality of economic opportunities for people across borders, no matter their social status. So his goal as a Zero To Mastery Academy instructor is to teach you the skills you need to live a fulfilling and rewarding life.

We're extremely lucky and excited to have Andrei as a DevOps Instructor here at the Zero to Mastery Academy. You're going to love learning with Andrei!

Courses

Advanced

AI Coding with Jupyter AI

1 Hours •17 Lessons

Learn to use Jupyter AI, which adds generative AI capabilities to Jupyter Lab and Jupyter Notebook, the most popular open-source tools for Python programmers, Data Scientists, and AI & Machine Learning Engineers.

Andrei Dumitrescu

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Intermediate

AI Coding with GitHub Copilot

1 Hours •17 Lessons

Learn to use GitHub Copilot, a powerful AI-powered programming partner that helps programmers write code faster and more efficiently

Andrei Dumitrescu

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Intermediate

DevOps Mastery: Secure Your Internet Traffic with WireGuard VPN

1 Hours •13 Lessons

Learn how to set up, configure, and secure your network with WireGuard VPN in this concise, hands-on course. Perfect for DevOps Engineers and those looking to enhance their online privacy and security quickly.

Andrei Dumitrescu

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Intermediate

Building AI Apps with the Gemini API

3.5 Hours •38 Lessons

Learn to use Google's Gemini API for building AI-powered applications. Plus you'll put your skills into action by building three projects using the Gemini API.

Andrei Dumitrescu

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Advanced

Developing LLM Apps with LangChain

4 Hours •41 Lessons

Learn how to build state-of-the-art LLM-powered applications with LangChain, Pinecone, OpenAI, and Python! We'll build together, step-by-step, line-by-line. This will be a true learning-by-doing experience!

Andrei Dumitrescu

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Advanced

Developing LLM App Frontends with Streamlit

4 Hours •25 Lessons

Learn to use Streamlit to create a frontend for your LLM-powered applications. Streamlit is an open-source Python library that simplifies the creation and sharing of custom frontends for AI applications with the world.

Andrei Dumitrescu

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Intermediate

Building AI Apps with the OpenAI API: GPT, DALL-E & Whisper

3.5 Hours •40 Lessons

Learn to use the OpenAI API for chat, image generation, text-to-speech, and speech-to-text so that you can utilize AI technologies in your applications. Plus you'll build an AI application for healthy daily meal plans.

Andrei Dumitrescu

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Intermediate

DevOps Bootcamp: Terraform

8 Hours •95 Lessons

Learn Terraform from scratch, from an industry expert. You'll learn Terraform fundamentals all the way to advanced, in-depth expertise so that you go from beginner to being able to get certified as a Terraform Associate!

Andrei Dumitrescu

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Intermediate

Bash Scripting: Learn Shell Scripting

10 Hours •120 Lessons

Learn Bash Scripting from scratch, from an industry expert. You'll learn Shell Scripting fundamentals plus get the practice and experience to get hired as a DevOps Engineer, SysAdmin, or Network Engineer.

Andrei Dumitrescu

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Beginner

DevOps Bootcamp: Learn Linux & Become a Linux Sysadmin

25 Hours •213 Lessons

This DevOps Bootcamp will take you from an absolute beginner in Linux to getting hired as a confident and effective Linux Sysadmin. Includes Ansible, Docker, IPFS + more!

Andrei Dumitrescu

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Other content

Linux Commands Cheat Sheet

Cheatsheet

Learn and remember the key Linux Commands with this handy quick reference guide (+ PDF) to the fundamentals of Linux Commands.

Andrei Dumitrescu

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Terraform Cheat Sheet

Cheatsheet

Official ZTM Terraform Cheat Sheet to help all those that want to learn and remember Terraform fundamentals.

Andrei Dumitrescu

View CheatSheet

Blog posts

Beginner’s Guide To Bash getopts (With Code Examples) preview

January 17th, 2025 · 17 min read

Beginner’s Guide To Bash getopts (With Code Examples)

Struggling with command-line options in Bash? Learn how to master getopts to simplify your scripts, handle errors, and impress your team with clean code!

Andrei Dumitrescu

DevOps Strategies for Handling Traffic Spikes preview

January 8th, 2025 · 21 min read

DevOps Strategies for Handling Traffic Spikes

Traffic spikes are inevitable—downtime doesn’t have to be. Discover DevOps strategies to scale smartly and handle surges with confidence.

Andrei Dumitrescu

Beginners Guide to Bash Regex (With Code Examples) preview

December 20th, 2024 · 18 min read

Beginners Guide to Bash Regex (With Code Examples)

New to Bash regex? This guide simplifies regex basics with easy-to-follow examples so you can confidently tackle searches and patterns in no time.

Andrei Dumitrescu

Beginner’s Guide to the for_each Meta-Argument in Terraform preview

October 26th, 2024 · 12 min read

Beginner’s Guide to the for_each Meta-Argument in Terraform

Discover the secret to efficient resource management! Learn how to use the for_each meta-argument to streamline your Terraform configurations today.

Andrei Dumitrescu

How To Check If A File Exists in Bash (With Code Examples) preview

October 3rd, 2024 · 11 min read

How To Check If A File Exists in Bash (With Code Examples)

Tired of scripts breaking due to missing files? Learn how to check if a file exists in Bash and master this crucial skill for smoother, error-free automation.

Andrei Dumitrescu

Beginner’s Guide to Dynamic Blocks in Terraform (With Code Examples) preview

September 26th, 2024 · 11 min read

Beginner’s Guide to Dynamic Blocks in Terraform (With Code Examples)

Learn how to use Terraform dynamic blocks to automate repetitive tasks, streamline infrastructure, and scale efficiently in this step-by-step guide.

Andrei Dumitrescu

How to Become a Systems Administrator [Step-By-Step in 6 Months] preview

August 29th, 2024 · 21 min read

How to Become a Systems Administrator [Step-By-Step in 6 Months]

Learn how to become a Systems Administrator, specializing in Linux. Get the roadmap to secure a high-demand job in the tech industry. (Includes resources!)

Andrei Dumitrescu

Bash Interview Prep: 30 Essential Questions and Answers preview

August 27th, 2024 · 25 min read

Bash Interview Prep: 30 Essential Questions and Answers

Ace your Bash interview! Explore 30 key questions with code examples that cover everything from basics to advanced topics. Get interview-ready now.

Andrei Dumitrescu

DevOps Linux Interview Prep: Questions, Answers, Code Examples preview

July 15th, 2024 · 16 min read

DevOps Linux Interview Prep: Questions, Answers, Code Examples

Ace your DevOps interview with our comprehensive Linux guide. Learn with practical questions, answers, and code examples for key concepts.

Andrei Dumitrescu

How to Become a DevOps Engineer: Step-By-Step Guide preview

March 21st, 2024 · 28 min read

How to Become a DevOps Engineer: Step-By-Step Guide

With 400,000+ jobs available and $120,000+ / year salaries, now is the perfect time to become a DevOps Engineer! Here's your step-by-step guide (with all the resources you need to go from complete beginner to getting hired).

Andrei Dumitrescu

How To Use Bash If Statements (With Code Examples) preview

September 25th, 2023 · 16 min read

How To Use Bash If Statements (With Code Examples)

Looking to level up your Bash skills with logic? In this guide, I cover everything you need to know about if statements in Bash - with code examples!

Andrei Dumitrescu

53 Terraform Interview Questions and Answers preview

April 21st, 2023 · 18 min read

53 Terraform Interview Questions and Answers

About to sit for a DevOps technical interview with Terraform? Learn the most common questions and answers that you need to know to ace your interview!

Andrei Dumitrescu

Top 5 Benefits Of Using Terraform preview

April 11th, 2022 · 9 min read

Top 5 Benefits Of Using Terraform

Are you a DevOps Engineer who wants to automate your tasks and streamline your workflow? If so, then Terraform may just be the tool for you!

Andrei Dumitrescu