What technology does abclinuxu.cz use?

abclinuxu.cz is built with jQuery, Google Analytics, Google Ads, Nginx.

Is abclinuxu.cz secure (HTTPS)?

Yes. abclinuxu.cz uses TLS 1.2 with a certificate issued by Let's Encrypt, valid until Sep 28, 2026.

Who hosts abclinuxu.cz?

Hosting provider information for abclinuxu.cz is not available yet.

What is abclinuxu.cz's SEO score?

abclinuxu.cz scored 65/100 for SEO in the latest analysis (fair).

What is abclinuxu.cz's overall website score?

abclinuxu.cz has an overall SiteGraph score of 73/100, combining SEO, performance, security, and accessibility.

abclinuxu.cz

AbcLinuxu.cz - Linux na stříbrném podnose

Last scanned Jul 26, 2026, 5:47 AM

Overall score

Fair

Summary

Komunitní portál: Linux, Open Source, BSD a jiné unixy. This website uses Nginx. SEO is fair (65/100) and accessibility is good (85/100). Security scores fair (65/100) and performance good (80/100). Top issue: No H1 heading found.

Komunitní portál: Linux, Open Source, BSD a jiné unixy. Nejvíce funkcí, nejaktivnější poradna, nejživější blogy. Pozor - návykové.

Top issues to fix

13 issues found · 5 high priority

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.
Slow estimated load (4.5s)
Performance
Use a CDN, enable caching/compression, and cut render-blocking assets — every extra second costs conversions.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

+7 more issues — details in the sections below.

SEO

5 issue(s) found

Performance

4.52 s

Security

HTTPS & header checks

Accessibility

2 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.

Komunitní portál: Linux, Open Source, BSD a jiné unixy. Nejvíce funkcí, nejaktivnější poradna, nejživější blogy. Pozor - návykové.

Meta tags

Title: AbcLinuxu.cz - Linux na stříbrném podnose
Description: Komunitní portál: Linux, Open Source, BSD a jiné unixy. Nejvíce funkcí, nejaktivnější poradna, nejživější blogy. Pozor - návykové.
Canonical: http://www.abclinuxu.cz/
Language: cs
Charset: UTF-8
Viewport
Robots meta: index,follow
Manifest

Technologies

Detected frameworks, languages, and tools.

jQuery Google Analytics Google Ads Nginx

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.2
Issuer: Let's Encrypt
Subject: abclinuxu.cz
Valid from: Jun 30, 2026
Valid to: Sep 28, 2026
Days until expiry: 61
SAN domains: abclinuxu.cz, pda.abclinuxu.cz, www.abclinuxu.cz

Security headers

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

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 0 · H2 13 · H3 0

Links

278 internal · 25 external · 20 broken

Images

31 total · 4 missing alt

Scripts / Styles

39 scripts · 3 stylesheets

JS / CSS size

4.6 KB · 0 B

Page size

83.4 KB

Robots.txt & Sitemap

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

SEO issues

No H1 heading found
No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://abclinuxu.cz
Final URL: https://www.abclinuxu.cz/
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 4.52 s
HTML size: 83.4 KB
Redirect chain: https://abclinuxu.cz → https://www.abclinuxu.cz/

See something wrong on this report? Request a correction

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