About TechGuide

TechGuide is the technical publication on rzwan.cloud, maintained by Rzwan. It covers Python, Linux administration, databases and application deployment. The intended readers are developers learning how to reason about failures, security boundaries and recovery.

What you will find here

Guides combine explanations, code examples and links to primary documentation. The useful part of a recipe is knowing its assumptions: operating system, runtime, required permissions, expected result and what to check when it fails.

How examples are reviewed

Examples may use AI assistance during drafting and revision. They should be treated as starting points for review, not as a guarantee that a deployment is secure. A page only claims an executed test when it supplies the test scope and environment. Documentation review and execution testing are different checks.

The Python verification lab includes downloadable checks for parameterized queries, transaction rollback, SQLite restoration and atomic file replacement. It uses disposable local files rather than production data.

Corrections and ownership

Rzwan maintains the publication and receives corrections through the contact page. We do not claim a separate engineering staff or certifications. See the editorial and testing policy for the scope of our examples.