scientificlinux.org

https://scientificlinux.org· First analyzed 03 May 2026· Updated 03 May 2026

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scientificlinux.org

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Hosting Provider

Fermi National Accelerator Laboratory (Fermilab)

IP Address

131.225.105.97

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Aurora, United States

ASN

AS3152

Organization

Fermi National Accelerator Laboratory (Fermilab)

Server

Apache

Nameservers

ns2.fnal.gov.ns1.fnal.gov.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.2 s10%

Speed Index

1.6 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

308 KB

11 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

masterblog-scientificlinuxorgCustom

Technology Stack

4 Technologies Detected

Libraries

Other

CSS Frameworks

Web Servers

SEO Analysis

D59/100

Meta Tags7/15

Content8/12

Headings5/8

Technical18/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

scientificlinux.orgscientificlinux.org

Scientific Linux | Information about the Scientific Linux distribution

No description available for this page.

Title Length70 chars

Recommended: 50-60 chars (~406px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description — important for click-through rates in SERPs

9 issues found

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Crawlability

Sitemap

Type: index

4 URLs

4 sub-sitemaps

robots.txt

4 rules

Sitemap reference found

Local SEO

Local Search Readiness

3/100

Poor

1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F34/100

Bot Access

20/25

Machine Read.

5/25

Schema Data

0/25

Citation

9/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

nav

Text ratio:4%

Words:214

Token eff.:Too Short

Sections/1K:4.7

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary13w

Descriptive Headingsavg 3w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

87/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

15/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

15/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

7/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

61/100

A+

38 mg

CO₂e / view

308.3 KB

Page Weight

90%

Cleaner Than

New Visitor

44 mg

Returning (cached)

22 mg

Annual (10K/mo)

4.6 kg

Emission Segments

Data Center

9 mg

Network

9 mg

Device

21 mg

Resource Breakdown

JavaScript

115.2 KB

Images

114.8 KB

CSS

39.7 KB

HTML

38.6 KB

Green Hosting Not Verified

Fermi National Accelerator Laboratory (Fermilab)

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

36%Critical

Interactive

HTTPS

No WAF

43d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

17.03.2026

Valid Until

15.06.2026

Subject Alternative Names (2)

scientificlinux.orgwww.scientificlinux.org

SHA-256 Fingerprint

D5:71:87:2A:DA:2C:B1:66:E5:4D:D6:D0:93:2F:01:7E:9E:CD:85:09...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 0s(private, max-age=0, must-revalidate)

connection

content-type

text/html; charset=UTF-8

date

Sun, 03 May 2026 04:49:04 GMT

link

<https://scientificlinux.org/wp-json/>; rel="https://api.w.o...

server

Apache

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

scientificlinux.org

Domain Age

21y 11m

Created

07.06.2004

Expires

07.06.2030

Last Updated

09.06.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

65/100

Mobile Friendly6 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Open Sans

WCAG Partial

74/100

Readability

/30

21/30

15px · LH 1.80

Hierarchy

/20

19/20

2.67x ratio · ✓ H1→H6

WCAG

/25

19/25

1:1 min contrast

Performance

/25

15/25

1 font · 1 req

Heading Font

Open Sans

Sans40px

Body Font

Open Sans

Sans15px

Contrast Ratio

1:1

2 issues

Reading Comfort

~33 CPL

Narrow lines

40px

20px

15px

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Hard to read: Flesch score 42/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.7x larger than body text.

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFontsFlesch 42

Color Palette

5 unique colors

Light

#ffffff

Background· 49.20000000000001%

#01018f

Primary· 6.6%

#aaa1b5

Secondary· 4.9%

#473485

Secondary· 3.2%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

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Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

scientificlinux.org(4)

Website Identity

scientificlinux.org

21 years old

Location detected: 🇺🇸 United Statesvia ip

GoDaddy.com, LLCen-US

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Last analyzed: 03 May 2026 at 04:49

Historical Analysis & Change Tracking