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Lynis turned 9 today. Happy birthday Lynis! https://github.com/CISOfy/lynis/blob/master/CHANGELOG.md
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How to solve common mistakes in open source software projects: Why we use your open source project (or not) - https://linux-audit.com/why-we-use-your-open-source-project-or-not/
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Open source software needs marketing as well https://linux-audit.com/how-to-promote-your-open-source-project/
Open source development is fun. Getting noticed between thousands of other projects is harder. We have a look at how to promote your open source project and get more users.
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The pseudo-filesystem /proc contains a lot of useful information for the system administrator. With the hidepid option we can restrict what users can see.
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When was the last time you used sysctl to tune the kernel? Did you know you can use regular expressions to gather specific keys? Read more: https://linux-audit.com/linux-hardening-with-sysctl/
Sysctl Hardening The GNU/Linux kernel powers a lot of systems, from big mainframes to the Android device in your pocket. If you want to achieve more security on your Linux systems, it would make sense to start hardening there, right? While improving security of the kernel looks easy at first sight, there is more to it than initially meets the eye. In this guide we have a look at the kernel and a common interface called sysctl. Why Invest Time [...
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Finding the installed compilers on your Linux system is not that easy. Here is how to do it: http://linux-audit.com/audit-installed-compilers-and-their-packages/
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Encrypting files with vim Everyone has secrets. Or at least some data you don’t want to show others, right? Vim is a common editor to be found on Linux systems. It has an option to create and use encrypted files. We will look at how to configure it and use this encryption capability. Encryption is the process of fiddling with data so that others no longer can’t read it. The idea is that you still can, so when we speak [...]
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Security auditing tool Lynis won another InfoWorld Bossie award! A great honor to receive this kind of recognition. http://www.infoworld.com/article/3121251/open-source-tools/bossie-awards-2016-the-best-open-source-networking-and-security-software.html#slide13
InfoWorld's top picks among open source tools for connecting devices and securing those devices and connections
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When should you do a penetration test on your environment? https://linux-audit.com/when-should-you-do-a-penetration-test/
Penetration Testing and Linux The information security field is filled with all kind of tests and assessments. One of them is the penetration test, also abbreviated to pentest or pen test. Last years, many security consultancy firms offer this test as part of their security services. So what is it really and when should you undergo a penetration test? Continue reading! What is a pentest? The short question to what a penetration is: a hack attack ...
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Based on a real question we received: how much system hardening is enough?
https://linux-audit.com/how-much-system-hardening-should-you-do/

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Lynis 2.3.0 now available (GitHub, DEB/RPM, or download). A good time to audit your systems again: https://cisofy.com/documentation/lynis/get-started/
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As a security firm, it was about time for our blog to make the jump to HTTPS with Let's Encrypt and enable the new HTTP/2 protocol: https://linux-audit.com/blog-migrated-to-https-and-http2/
Our blog is about Linux security, so one day it had to be migrated to HTTPS. Last weekend that migration (finally) happened. After a few days of testing, it is now live with the following options: HTTPS by default New HTTP/2 protocol Available via IPv4 and IPv6 Caching Before, we had our blog running with Pound and a Varnish cache. We also optimized these two software packages for both performance and security. With those gone, a lot of optimizat...
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System Auditing, Hardening, Compliance
Introduction
Simplified security for business running Linux and UNIX-based systems. We created the Lynis Enterprise suite to help companies audit their systems, and stay compliant with security standards.
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De Klok 28 5251DN, Vlijmen The Netherlands