Available for training sessions

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Professional Linux system administration training by Stefan — UK-based trainer specializing in Bash, terminal tools, and command-line mastery.

10+ Open Source Tools
5+ Years Experience
⭐57 GitHub Stars
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whoami

Linux enthusiast, Bash aficionado, and terminal tool creator

👤

About Me

Stefan - Linux Trainer

Hi, I'm Stefan from the UK. I'm a passionate Linux user with a deep love for all things Bash and terminal-based. I believe the command line is the most powerful tool in a developer's arsenal.

Founded cmdRed Ltd in October 2025, I focus on building practical tools and training the next generation of Linux system administrators.

Expertise

IT Trainer
Linux System Administration
Bash Scripting
Automation & DevOps
Debian & Ubuntu
RHEL Systems
Mac OS
stefan@workstation:~
stefan@linux:~$ whoami
Stefan — Linux Sysadmin Trainer & Tool Builder
Founder @ cmdRed Ltd
UK-based 🌍
stefan@linux:~$ cat interests.txt
• Bash scripting & shell automation
• Terminal emulator customization
• Open source tooling
• Linux training & education
stefan@linux:~$ _

Featured Projects

Open source tools I've built for the Linux community

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⭐ 10

pdrx

Imperatively install/remove packages while automatically updating a declarative config. Restore your exact setup on any major Linux distribution.

package-manager shell portable
View on GitHub →
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⭐ 3

fza

Lightning-fast package search with fuzzy finding. Find and install packages across multiple distributions with ease.

fzf search packages
View on GitHub →
📖
⭐ 1

fzm

Beautiful interactive terminal manpage viewer with fuzzy finding. Enhanced browsing with intuitive search and rich previews.

manpages documentation fzf
View on GitHub →
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⭐ 1

lsgroups

Professional group listing tool with beautiful formatting and security insights for system administrators.

sysadmin security groups
View on GitHub →
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⭐ 0

uma

Professional Umask Permission Visualizer — analyze and understand umask values with beautiful terminal output.

permissions security sysadmin
View on GitHub →

Training Services

Learn Linux from a command-line enthusiast

Linux Fundamentals

Master the basics of Linux — file system navigation, permissions, user management, and essential commands. Perfect for beginners.

  • Command line basics
  • File & directory operations
  • Package management
  • User & group management
4-6 sessions

Bash Scripting Mastery

Automate your workflow with Bash. Learn scripting patterns, functions, error handling, and best practices for production scripts.

  • Script structure & syntax
  • Variables & control flow
  • Functions & error handling
  • Real-world automation projects
6-8 sessions

Mac OS for Switchers

Master macOS from a Linux user's perspective. Learn the Unix underpinnings, Homebrew package management, and terminal workflows.

  • Unix command line on macOS
  • Homebrew package management
  • zsh configuration & scripting
  • Linux-to-Mac transition guide
4-6 sessions

Terminal Environment

Build a powerful terminal setup. Learn TMux, modern terminals (Kitty/Alacritty), dotfiles management, and workflow optimization.

  • Terminal emulator setup
  • TMux configuration
  • Dotfiles management
  • Custom tooling & aliases
4 sessions

Book a Session

Schedule your Linux training consultation

How It Works

1

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2

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3

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Session Rates (Flat Fees)

Consultation (30 min) FREE
1 Week Training (5 consecutive days) £2,500
Bespoke Training Content Custom

* Bespoke training duration, detail, and length confirmed based on flat rate fees

Ready to Start Training?

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Free Consultation

30 minute call to discuss your training needs

📅

1 Week Training

5 consecutive days of comprehensive training

£2,500
Enquire Now

Bespoke Content

Custom training material tailored to your needs

Custom
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What Students Say

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Get In Touch

Ready to level up your Linux skills?

Let's Connect

Whether you're looking for individual training, corporate workshops, or just have questions about Linux — I'm here to help.

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Company cmdRed Ltd
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Location United Kingdom