Difference between CentOS, Fedora, and RHEL

Difference between CentOS, Fedora, and RHEL The biggest open source company is nowadays Red Hat. It is known for its contributions to many open source projects, including the Linux kernel itself. Less known is that Red Hat is involved in different Linux distributions, directly or indirectly. Fedora Fedora has received many updates and individual releases over the years. It is a playground for new functionality. Often new technology is found here. It can be compared with other distributions like Arch […]

Read more

Automatic Security Updates with DNF

Automatic Security Updates The Dandified YUM tool, DNF, has become a powerful package manager for systems running Fedora. One of the great options is that security patches easily requested. This allows us for automatically security patching of our systems. Let’s explore the options and see how dnf-automatic can help us with fully automated patching. Security Patches The newer versions of Fedora use DNF. To check available security patches, use the dnf command. dnf updateinfo list security While this output is […]

Read more

Showing Available Security Updates with DNF

Checking Security Updates for your Software Packages DNF is the default package manager since Fedora 22. As it is considered to be a better version of YUM, some of our Lynis users asked for DNF support. With focus on auditing and security patching, we definitely wanted to see that for ourselves. While building support, I’ve gathered the most important commands. In this blog post we will have a look how we can leverage the DNF output to show only the […]

Read more

Determine Processes Which Need a Restart with checkrestart/needrestart

Determine which processes need a restart after software patching Proper software patch management helps reducing weaknesses on your systems. But even if you patched an outdated system, old processes and libraries can continue to run in memory. For example when a library is updated, an active program might still use the old version. To really finish the process of software patching, we have to do more. This includes preparation, performing the update and finally check if we need a restart […]

Read more

Find the alternatives: CIS-CAT auditing tool

Alternatives to the CIS-CAT auditing tool The Center for Internet Security, CIS for short, is the organization behind several in-depth hardening guides. The quality of these hardening guides is outstanding, with a high level of detail. This high level of detail has one downside: it costs a lot of time to read, try and test the recommendations. Sometimes we simply don’t have the time to do an extensive audit by hand. Let alone the time to actually repeat the auditing […]

Read more