Tech Couch

A Comfy Corner for Software, Security, Cloud, and AI

Written by engineers, not ai

Understanding the linux tr utility

Mapping characters one by one

A guide to regular expressions on linux

Including BRE and ERE syntax

Managing windows instances on incus

A comprehensive guide to vm installation and caveats

Building practical shell pipelines

Answering complex questions by chaining simple commands

Mounting filesystems on linux

Including device identifiers, mount options and common errors

Essential incus operator guide

The 80% you actually need for most use cases

The text encoding error field guide

Same bytes, different characters

Manually containerizing an application without a runtime

Understanding how docker and incus work internally