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Tuesday, April 14, 2026

Certificate Changes in 2026: My Full Linux Admin Blog Series

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A complete series covering TLS basics, DigiCert trust changes, certificate lifetime reductions, and automation for Linux users. Intro...

My 2026 Certificate Checklist for Linux Admins and Website Owners

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Part 6 of 6 A practical 2026 checklist for TLS certificate trust changes, DigiCert chain updates, automation, and monitoring. Int...

How to Automate TLS Certificate Renewals on Linux Before Short Lifetimes Become a Problem

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Part 5 of 6 Shorter TLS certificate lifetimes mean manual renewal is no longer enough. Here is how Linux admins can automate renewals...

Are TLS Certificate Lifetimes Really Dropping to One Month? Here Is the Real Timeline

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Part 4 of 6 People keep saying certificate validity is dropping from one year to one month. Here is the real public TLS timeline and ...

How to Check If Your Linux Server Uses an Affected DigiCert Certificate Chain

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Part 3 of 6 A practical Linux guide to inspecting TLS certificate chains with OpenSSL before DigiCert trust changes cause browser err...

Why Mozilla and Chrome Are Distrusting Some Older DigiCert Certificate Chains

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Part 2 of 6 Older DigiCert certificate chains are losing browser trust in 2026. Here is what is changing, who is affected, and why it...

TLS Certificates Explained Simply: A Beginner-Friendly Guide for Linux Users

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Part 1 of 6 A simple guide to TLS certificates, certificate chains, root CAs, and intermediates for Linux users, website owners, and ...