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tldp.org

The Linux Documentation Project

Last scanned Jul 25, 2026, 8:25 AM · 1 view

71

Overall score

Fair

Summary

The Linux Documentation Project is working towards developing free, high quality documentation for the Linux operating system. This website is hosted on UNC-CH - University of North Carolina at Chapel Hill, US. SEO is fair (60/100) and accessibility is good (75/100). Security scores fair (50/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.

The Linux Documentation Project is working towards developing free, high quality documentation for the Linux operating system. The overall goal of the LDP is to collaborate in all of the issues of Linux documentation.

United States
Hosted on UNC-CH - University of North Carolina at Chapel Hill, US

Top issues to fix

14 issues found · 5 high priority

  • TLS certificate expires in 14 days

    Security

    Renew now (or enable auto-renewal) — an expired certificate blocks visitors with a full-page browser warning.

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • No H1 heading found

    SEO

    Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.

  • Missing viewport meta tag

    Accessibility

    Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

+8 more issues — details in the sections below.

60

SEO

6 issue(s) found

100

Performance

261 ms

50

Security

HTTPS & header checks

75

Accessibility

3 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

The Linux Documentation Project is working towards developing free, high quality documentation for the Linux operating system. The overall goal of the LDP is to collaborate in all of the issues of Linux documentation.

Meta tags

Title
The Linux Documentation Project
Description
The Linux Documentation Project is working towards developing free, high quality documentation for the Linux operating system. The overall goal of the LDP is to collaborate in all of the issues of Linux documentation.
Canonical
Language
Charset
iso-8859-1
Viewport
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

CDN provider
—
IP address
152.19.134.160
ASN
AS36850 (UNC-CH - University of North Carolina at Chapel Hill, US)

DNS records

TypeValue
A
  • 152.19.134.160
AAAA—
MX
  • a.mx.it-zone.org
TXT
  • v=spf1 v=spf1 mx a:a.mx.tldp.net ~all
  • google-site-verification=TzJHmLwr-OQ5SzHZVFemmWrJOXtiVPvMAdqwrziVSmU
NS
  • b.ns.random.re
  • c.ns.random.re
  • a.ns.random.re
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Google Trust Services
Subject
tldp.org
Valid from
May 10, 2026
Valid to
Aug 8, 2026
Days until expiry
14
SAN domains
tldp.org, *.tldp.org, tldp.net, *.tldp.net

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 0

Links

23 internal · 5 external · 1 broken

Images

4 total · 0 missing alt

Scripts / Styles

0 scripts · 0 stylesheets

JS / CSS size

0 B · 147 B

Page size

9.9 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
1
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Meta description longer than 160 characters
  • Missing canonical link
  • No H1 heading found
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • sitemap.xml not found

Accessibility issues

  • No H1 heading found
  • Missing <html lang> attribute
  • Missing viewport meta tag

Scan details

Requested URL
https://tldp.org
Final URL
https://tldp.org
HTTP status
200
HTTP version
HTTP/2
Response time
261 ms
HTML size
9.9 KB
Redirect chain
https://tldp.org

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does tldp.org use?
We did not detect any specific technologies for tldp.org in the latest scan.
Is tldp.org secure (HTTPS)?
Yes. tldp.org uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Aug 8, 2026.
Who hosts tldp.org?
tldp.org is hosted on UNC-CH - University of North Carolina at Chapel Hill, US.
What is tldp.org's SEO score?
tldp.org scored 60/100 for SEO in the latest analysis (fair).
What is tldp.org's overall website score?
tldp.org has an overall SiteGraph score of 71/100, combining SEO, performance, security, and accessibility.