How to update Lynis

How to update Lynis With every software tool receiving improvements and bug fixes, it’s important to update Lynis as well. In this article we have a look at how to easily upgrade Lynis. Options Two common options to keep software up-to-date is by using a package, or the usage of a custom archive. Installing Lynis is optional, running it from remote (or local) storage is a valid option. Lynis Packages On the CISOfy software repository you can find a Lynis […]

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CAATTs for Linux: Lynis

CAATTs for Linux Within the field of the audit profession the usage of CAAT (Computer-assisted audit techniques) or CAATTs (computer-assisted audit tools and techniques) is growing. Lynis is filling this gap for Linux and Unix based systems. It’s a well-known and stable tool in this area and improves the audit process by automation. Only a few items could then be checked manually. This saves time, makes the audit more predictable and increases the quality of the overall audit. Lynis Based […]

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How to use Lynis

How to use Lynis This article explains in a few quick steps how to start with using Lynis. A more extensive explanation can be found in the documentation of Lynis. Download Lynis: wget http://cisofy.com/files/lynis-version.tar.gz Unpack tarball: tar xfvz lynis-version.tar.gz This will unpack the tarball with a Lynis directory. Go into this directory: cd lynis-version When running Lynis for the very first time, just just the -c parameter. It will start the audit process and pauses after every batch of tests. […]

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Lynis Hardening Index

Lynis Hardening Index At the end of each Lynis scan the report will be displayed. This report will include the findings (warnings and suggestions) and general information like the amount of security tests performed. Additionally the location of the log file and report data will be displayed. Between all this information there is a “Lynis hardening index” displayed. This index is  unique to Lynis. The index gives the auditor an impression on how well a system is hardened. This number […]

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Securing Linux: Audit with Lynis (an introduction into auditing)

Introduction Securing a Linux system can take a lot of time. For this purpose we have written Lynis, a quick and small audit tool. It’s an open source tool and freely available. You just need root permissions and a common shell and you’re ready to do your first audit. The main audience for this tool is auditors, security professionals, penetrating testers and system administrators. First audit Most Linux distributions already have Lynis in their software repository. If not, then download Lynis […]

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Lynis stuck during testing

Introduction Normal Lynis scans take a few minutes to complete, therefore any test taking more than 1 minute, might be stuck during its test. Within this article we have a look at a few things you can do. Stuck When a particular test is taking a long time, the test might be stuck. However, that’s not always the case. To determine what Lynis is doing, open up a second terminal and start with running ps aux to see what processes […]

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