Dev tools cheat sheets

Dev tools cheat sheets on Sefism, written by Tauseef Fayyaz: every concept in plain words, why it is used and the pitfall that catches people out.

76 sheets
5120 concepts

Free to learn. Credits keep it fair.

Reading is free. Adding a roadmap, keeping a cheat sheet or asking Tauseef a question uses credits, which only make sure the platform goes to people who are actually learning.

15creditswhen you join
1stroadmapfree to add
Morecreditson request, as you learn

Foundations

Start here if you are new or your basics are patchy.

Cheat sheet · Foundations
Linux, terminal and Git cheat sheet
Shell, Git, SSH and your dev setup.
Chapters
1. 1Your machine
2. 2Shell basics
3. 3Text tools
+ 5 more
- 8 chapters
- 78 concepts
Free
Cheat sheet · Foundations
Coding with AI tools cheat sheet
Claude Code, Cursor, Copilot, used well.
Chapters
1. 1What AI coding tools are good and bad at
2. 2Setup and project context
3. 3Prompting for code
+ 7 more
- 10 chapters
- 77 concepts
Free
Cheat sheet · Foundations
Git cheat sheet
How Git stores your work, the everyday commands, branching, undoing mistakes, remotes, reviews and team workflows.
Chapters
1. 1How Git thinks
2. 2Setup and everyday commands
3. Branching, merging and rebasing
+ 6 more
- 9 chapters
- 65 concepts
Opens with credits
Cheat sheet · Foundations
Linux command line cheat sheet
The Linux shell from first commands to safe Bash scripts: files, text tools, permissions, processes, services, SSH and more.
Chapters
1. 1Filesystem and navigation
2. 2Files and text tools
3. Redirection, pipes and the shell
+ 6 more
- 9 chapters
- 65 concepts
Opens with credits

Build products

Ship real apps for the web and phones.

Cheat sheet · Build products
Choosing an LLM and AI stack cheat sheet
Models, hosting and tools for your use case.
Chapters
1. 1Start from the task
2. 2Reasoning and quality
3. Speed and cost
+ 7 more
- 10 chapters
- 75 concepts
Opens with credits
Cheat sheet · Build products
Prompt Engineering cheat sheet
Prompt anatomy, few-shot examples, chain of thought, structured output, long context, prompts for code and study, and testing prompts.
Chapters
1. 1Anatomy of a prompt
2. 2Zero-shot and few-shot prompting
3. Chain of thought and reasoning
+ 5 more
- 8 chapters
- 55 concepts
Opens with credits

Browse the cheat sheets by topic

Each of these is its own page: the foundations shelf, the career shelf, the sheets that are open end to end. The filters above do the same thing without a page load.

Work with me

Stuck on something specific?

Writing only gets you so far. If you want an answer to your situation rather than the general case, book a session and we will work through it together. Sessions are free for approved Sefism members, and a few slots open each week.