Editors

How to Save and Quit Vim (Without Losing Your Changes)

Save and exit Vim with Esc, :wq, and Enter. Learn when :x or :q! fits, why E37 and E212 stop a command, and how to handle an editor opened by Git.

How to Undo and Redo in Vim

Use u and Ctrl+R to undo and redo in Vim. See why undo blocks differ from keystrokes, how branches work, and when saved or reopened files keep history.

How to Find and Replace Text in Vim

Replace text in Vim with the right line range, whole-word or literal patterns, and confirmation. See Visual-selection examples, undo steps, and common errors.

How to Show Line Numbers in Vim

Show or hide line numbers in Vim, compare absolute, relative, and hybrid modes, save your choice in vimrc, and fix numbering that looks wrong.

How to Use the Nano Text Editor in Linux

Learn Nano with a safe practice file: open and edit text, choose the right save or exit action, check the result, and handle permissions or changed shortcuts.