[pappy@chmodx]:$ cat VALIDATION.md

Validation & Scope

Why this site is deliberately narrow about what it claims.

Baseline

This site targets Ubuntu 24.04 LTS (Noble). Linux is not one single command-line implementation: utilities, options, package versions, shells, and even command availability can differ across distributions.

Primary sources

Ubuntu 24.04 Manpages — the primary source for packaged command documentation.
GNU Bash Reference Manual — used for Bash builtins such as cd, source, export, history, and type.
GNU Coreutils Manual — authoritative upstream documentation for GNU utilities.

What "verified" means here

The pages do not claim that a command behaves identically on every Linux distribution. The examples and summaries are written against the Ubuntu 24.04/GNU/Bash documentation baseline and intentionally avoid obscure or version-sensitive flags unless they are needed to explain the command.

Local validation script

After deploying the site, run /var/www/chmodx-linux/validate.sh on the Ubuntu server. It checks that each external command exists and has a local manual page, and that each Bash builtin is recognized by Bash.

cd /var/www/chmodx-linux
sudo ./validate.sh

Important: no static cheatsheet can honestly guarantee that every command will behave the same on every Linux distribution or future version. The site avoids making that claim; it anchors its documentation to a specific Ubuntu LTS baseline and points readers to the authoritative source.