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Securing Ubuntu Linux

An objective, consensus-driven security guideline for the Ubuntu Linux Operating Systems.

A step-by-step checklist to secure Ubuntu Linux:

Download Latest CIS Benchmark Free to Everyone
For Ubuntu Linux 16.04 (CIS Ubuntu Linux 16.04 LTS Benchmark version 1.1.0)

CIS has worked with the community since 2013 to publish a benchmark for Ubuntu Linux.

Other CIS Benchmark versions:

For Ubuntu Linux (CIS Ubuntu Linux 22.04 LTS Benchmark version 1.0.0)
Complete CIS Benchmark Archive

Want to skip most manual steps?

Use a CIS Hardened Image Buy Per Server Hour
CIS Hardened Image available for Benchmark version 2.1.0
Assess and/or remediate Only Available to CIS SecureSuite Members
Build Kit available for Benchmark version 1.1.0
CIS-CAT Pro is included with membership and can automatically test for compliance and remediate with this benchmark.
Ubuntu Linux is in CIS-CAT Lite edition too
Try CIS-CAT Lite for free

CIS Covers Other Server Technologies

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Information Hub

CIS Ubuntu Linux Benchmarks

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