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Security Leftovers

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  • Open-source security tools for cloud and container applications

    The use of containers is becoming increasingly popular, and container security is more critical than ever. Luckily, there are various tools that can help keep your business safe! This article covers some popular open-source tools that your DevOps team can use to secure your container environment.

    As the use of containers is becoming more popular and streamlined, the security aspects related to containers have also become more critical for businesses. Containerization has particular structural and operational elements that need special attention. The architectural differences like a shared kernel for containers demand a different security approach altogether, in comparison to traditional security approaches. This makes it very important to understand and perform container-specific security scanning at the earlier stages of the build process. To meet these dynamic requirements of the DevOps teams, several open-source security tools are available in the market. This article covers some popular open-source security tools your DevOps teams can use to ensure the security of your container environment.

  • Top 5 Open Source Serverless Security Tools

    The growing popularity of serverless architecture has led to its massive adoption. My organization has jumped on the serverless bandwagon and it lives up to expectations. The advantages have been tremendous—we have more time to focus on the development, marketing and deployment of the software now that we need not spend much time on infrastructure maintenance.

  • How technical debt is risking your security

    Everyone knows they shouldn't take shortcuts, especially in their work, and yet everyone does. Sometimes it doesn't matter, but when it comes to code development, though, it definitely does.

    As any experienced programmer knows, building your code the quick and dirty way soon leads to problems down the line. These issues might not be disastrous, but they incur a small penalty every time you want to develop your code further.

    This is the basic idea behind technical debt, a term first coined by well-known programmer Ward Cunningham. Technical debt is a metaphor that explains the long-term burden developers and software teams incur when taking shortcuts, and has become a popular way to think about the extra effort that we have to do in future development because of the quick and dirty design choice.

  • Linux Developers Discuss Flushing L1 Cache On Context Switches In Light Of Vulnerabilities

    In light of data sampling vulnerabilities like MDS, engineers from Amazon, Google, and other organizations are discussing a proof-of-concept implementation that would optionally flush the L1 data cache on context switches.

    Flushing out the L1 data cache on each context switch would result in yet another performance hit so it isn't being taken lightly. At least based upon public information at this point doesn't appear necessary but an extra step to enhance the system security following Intel's data sampling vulnerability disclosures. The "request for comments" patch by an Amazon engineer describes it as an optional feature for those that are "paranoid due to the recent snoop assisted data sampling vulnerabilites, to flush their L1D on being switched out. This protects their data from being snooped or leaked via side channels after the task has context switched out."

    The discussed means are ensuring data left in the L1d would be cleared out and a second avenue being explored is clearing the L1 cache should any untrusted (potentially malicious) process be starting up so to clear out the L1 cache before hand.

More in Tux Machines

Announcing the release of Oracle Linux 7 Update 8

Oracle is pleased to announce the general availability of Oracle Linux 7 Update 8. Individual RPM packages are available on the Unbreakable Linux Network (ULN) and the Oracle Linux yum server. ISO installation images will soon be available for download from the Oracle Software Delivery Cloud and Docker images are available via Oracle Container Registry and Docker Hub. Oracle Linux 7 Update 8 ships with the following kernel packages, which include bug fixes, security fixes and enhancements... Read more

Devices: Rockchip, Olimex, DragonBoard and Axiomtek

LibreOffice: LibreOffice Macro Team, Writer and Impress

  • LibreOffice Macro Team: progress report

    Macros help users to automate common tasks in LibreOffice. In September 2019 we announced a new team in our community to work on macro support. A progress report was published in November 2019, so let’s review everything that happened since then. If you are interested in contributing to the macro team (development, testing or documentation), we’d love to hear from you – please send an email to and we’ll get in touch.

  • Padded numbering in Writer, part 2

    I already posted about the start of padded numbering support in Writer, there the focus was to insert 0 characters to pad up the result to 2 characters. Let’s see how that got extended in the recent past… First, thanks Nicolas Christener who made this work by Collabora possible.

  • Presentation templates for Impress

    Possibly you search some nice presentation templates for LibreOffice Impress, because in-build templates aren't good for you?

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