How to Audit SSH Keys Before They Become a Liability

Episode 25 of Linux Server Admin with Fexingo: Sysadmin, Bash, and Server Engineering dives into SSH key hygiene. Lucas and Luna walk through a real-world scenario: a startup that accumulated 400 authorized SSH keys across 60 servers, with keys tied to former employees and contractors still active. They explain why this happens, how to inventory keys using simple Bash scripts and tools like ssh-audit, and how to enforce rotation policies with certificates and short-lived keys. By the end, you'll know how to run a one-liner to list every key on a server, why you should disable password authentication entirely, and how to build a renewal cadence that matches your team's turnover. Practical, specific, and immediately actionable for anyone managing Linux servers.

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