Category: general

Greece is struggling against COVID-19

If a person in Greece wants to learn more about COVID-19, they can access the website of the National Organization of Public Health (Εθνικός Οργανισμός Δημόσιας Υγείας/ΕΟΔΥ). This appears to be the main portal on COVID-19 in Greece. See the screenshot below on how it looks. You can scroll down, but the screenshot shows the …

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Permanent link to this article: https://blog.simos.info/greece-is-struggling-against-covid-19/

Permanent link to this article: https://blog.simos.info/using-command-aliases-in-lxd-to-exec-a-shell/

How to use virtual machines in LXD

Traditionally, LXD is used to create system containers, light-weight virtual machines that use Linux Container features and not hardware virtualization. However, starting from LXD 3.19, it is possible to create virtual machines as well. That is, now with LXD you can create both system containers and virtual machines. In the following we see how to …

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Permanent link to this article: https://blog.simos.info/how-to-use-virtual-machines-in-lxd/

Comparison between LXC and LXD

More, but on the same hardware Traditionally, we would have a physical computer and expect to run a single operating system on it. One way to go over this limitation, is to use virtualization, which allows us to run multiple operating systems (virtual machines) on a computer. For virtualization to work efficiently, we would need …

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Permanent link to this article: https://blog.simos.info/comparison-between-lxc-and-lxd/

How to setup Netdata in a LXD container for real-time monitoring

Netdata does real-time health monitoring and performance troubleshooting for systems and applications. It helps you instantly diagnose slowdowns and anomalies in your infrastructure with thousands of metrics, interactive visualizations, and insightful health alarms. When you set it up on your system, Netdata sets up a Web page where you can view real-time information, including CPU …

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Permanent link to this article: https://blog.simos.info/how-to-setup-netdata-in-a-lxd-container-for-real-time-monitoring/

Testing CVE-2019-11043 (php-fpm security vulnerability) with LXD system containers

CVE-2019-11043 is a buffer overflow in php-fpm that under certain conditions, can lead to remote execution. There is an exploit at PHuiP-FPizdaM that targets certain nginx and php-fpm configurations. On their page, the describe how to use Docker to test this exploit. In this post, we use LXD to test the exploit and verify whether …

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Permanent link to this article: https://blog.simos.info/testing-cve-2019-11043-php-fpm-security-vulnerability-with-lxd-system-containers/

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