Linux

Linux can list a directory along with entries inside its subdirectories, and that output can extend farther than you need. The tree command displays directories as an indented tree, and its -L option caps how deep that display goes. I’ll explain what recursive listing means, then show how to cap a tree listing’s depth. TL;DR

You have text to replace and want the match to work regardless of capitalization. sed searches input text and can replace matches, and its i substitution flag makes the search ignore capitalization. I’ll show how to choose the substitution flags and check the output before an in-place edit. TL;DR: Ignore Case with sed For a

When you’re setting up an Ubuntu machine to host a website, you need the server software that can serve pages and handle dynamic content. LAMP is a web stack that uses Apache to serve requests, PHP to process pages, and MySQL to store application data. I’ll show you how to install the Ubuntu repository packages

Opening a Linux shell on Windows starts with knowing whether a Linux distribution is already installed. WSL lets Windows run a Linux distribution, a packaged Linux environment such as Ubuntu, alongside Windows applications. This article shows how to check for an installed distribution and start the default one or choose a named distribution. TL;DR If

Swap can be active now and return after a reboot if its boot configuration still enables it. The swapoff command turns off active swap areas, while changing the boot configuration prevents them from starting again. I’ll show you how to check active swap and keep it disabled after reboot. TL;DR Run sudo swapoff -a to

You may have a sensor reading and want to see it or act on it. An IoT Raspberry Pi project connects a physical device or sensor to a network, where its readings can be stored, viewed or used to trigger an action. I’ll walk through Raspberry Pi IoT project ideas and show how to plan