Editing

Config File Editing with sed

Using sed to safely automate edits to configuration files — in-place editing with backups, targeting keys precisely, and pitfalls when scripting changes to pro…

In-Place Editing

Learn how sed's -i option edits files directly on disk, how to create backups, and the portability differences between GNU and BSD/macOS sed.

sed: Stream Editing Basics

Learn sed, the non-interactive stream editor, for search-and-replace, line deletion, and text transformation directly from the command line or in scripts.

Viewing and Editing Files (cat, less, nano, vim basics)

Learn the core command-line tools for reading and modifying text files, from quick dumps with cat to paginated viewing with less and full editing in nano and v…

Vim Keyboard Shortcuts Cheat Sheet

A reference for Vim modal editing covering movement, editing commands, search and replace, and buffer management.