Linux Commands

Command references for core Linux tools, syntax, examples, and practical one-liners.

Feb 1, 2026 • 5 min read

Free Command in Linux

Learn how to use the Linux free command to check RAM and swap usage. Includes output explained, human-readable format, and useful options.

Feb 1, 2026 • 7 min read

Diff Command in Linux

Learn how to use the diff command in Linux to compare files and directories. Covers unified/context formats, ignore case/whitespace, and common options.

Nov 13, 2020 • 5 min read

How to Clear (Flush) the DNS Cache on Windows, MacOS, and Linux

This article provides instructions on how to flush your DNS cache on different operating systems and web browsers.