fraggle/WebsiteTemplate
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

first commit

Browse Source
This commit is contained in:
fraggle
2026-01-25 11:33:37 -04:00
commit 6f42a58ee5
148 changed files with 32974 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cheatsheets/sha256sum.html
+93
View File
@@ -0,0 +1,93 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self'; style-src 'self'; font-src 'self' data:; img-src 'self' data:; connect-src 'self'; base-uri 'self'; form-action 'self' https://defcon.social https://bsky.app;">
<meta http-equiv="X-Content-Type-Options" content="nosniff">
<link rel="stylesheet" href="../assets/css/style.css">
<link rel="icon" type="image/x-icon" href="../favicon.ico">
<script>
// Apply theme immediately to prevent flash
(function() {
const theme = localStorage.getItem('theme') ||
(window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light');
document.documentElement.setAttribute('data-theme', theme);
})();
</script>
<title>sha256sum Cheatsheet - Launch Pad</title>
</head>
<body>
<button class="theme-toggle" id="themeToggle" aria-label="Toggle dark mode">
<svg class="theme-icon theme-icon-moon" xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"></path></svg>
<svg class="theme-icon theme-icon-sun" xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" style="display: none;"><circle cx="12" cy="12" r="5"></circle><line x1="12" y1="1" x2="12" y2="3"></line><line x1="12" y1="21" x2="12" y2="23"></line><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"></line><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"></line><line x1="1" y1="12" x2="3" y2="12"></line><line x1="21" y1="12" x2="23" y2="12"></line><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"></line><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"></line></svg>
</button>
<br/><br/>
<div class="name">
__ _______________________ _________._________________________
\_ _____/ \______ \ / _ \ / _____/ / _____/ | | \_ _____/
| __) | _/ / /_\ \ / \ ___ / \ ___ | | | __)_
| \ | | \ / | \ \ \_\ \ \ \_\ \ | |___ | \
\___ / |____|_ / \____|__ / \______ / \______ / |_______ \ /_______ /
\/ \/ \/ \/ \/ \/ \/
</div>
<div class="blog-page-header">
<div class="blog-header-content">
<a href="/cheatsheets" class="back-link" title="Back to Cheatsheets">
← Back to Cheatsheets
</a>
<h1 class="blog-page-title">sha256sum Cheatsheet</h1>
</div>
</div>
<div class="blog-posts-container">
<div class="blog-post-content">
<p>
Quick reference for <code>sha256sum</code>, a tool to compute and verify SHA-256 checksums.
SHA-256 is the common default for verifying downloads and file integrity.
</p>
<h2>Basic usage</h2>
<ul>
<li><code>sha256sum file.img</code> – print SHA-256 hash and filename.</li>
<li><code>sha256sum file1 file2</code> – hash multiple files.</li>
<li><code>echo -n "test" | sha256sum</code> – hash data from stdin.</li>
</ul>
<h2>Common options</h2>
<ul>
<li><code>-b</code> – read files in binary mode (default on Linux).</li>
<li><code>-t</code> – read files in text mode (mainly for non-Unix systems).</li>
<li><code>-c</code> – check SHA-256 sums from a file.</li>
</ul>
<h2>Creating and verifying checksum files</h2>
<ul>
<li><code>sha256sum file.img > file.img.sha256</code> – save checksum.</li>
<li><code>sha256sum file1 file2 > checksums.sha256</code> – create checksum list.</li>
<li><code>sha256sum -c file.img.sha256</code> – verify a single file.</li>
<li><code>sha256sum -c checksums.sha256</code> – verify multiple files.</li>
</ul>
<h2>Tips</h2>
<ul>
<li>Publish SHA-256 hashes over HTTPS, signed release notes, or another trusted channel.</li>
<li>Users should compare the hash they compute with the published hash, not just “it downloaded fine”.</li>
<li>For even stronger hashes, see <code>sha512sum</code>.</li>
</ul>
</div>
</div>
<script async type="text/javascript" src="../blog/analytics.js"></script>
<script src="../theme.js"></script>
</body>
</html>
{
"cells": [],
"metadata": {
"language_info": {
"name": "python"
}
},
"nbformat": 4,
"nbformat_minor": 2
}