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Tux Machines
Posted by Roy Schestowitz on Sep 01, 2023
> Let me show you a very practical feature of qcow2 virtual disk format, that is available in OpenBSD vmm, allowing you to easily create derived disks from an original image (also called delta disks).
> A derived disk image is a new storage file that will inherit all the data from the original file, without modifying the original ever, it's like stacking a new fresh disk on top of the previous one, but all the changes are now written on the new one.
> This allows interesting use cases such as using a golden image to provide a base template, like a fresh OpenBSD install, or create a temporary disks to try changes without harming to original file (and without having to backup a potentially huge file).
> This is NOT OpenBSD specific, it's a feature of the qcow2 format, so while this guide is using OpenBSD as an example, this will work wherever qcow2 can be used.
> We have released LibreSSL 3.8.1, which will be arriving in the LibreSSL directory of your local OpenBSD mirror soon. This is a development release for the 3.8.x branch, so we appreciate early testing and feedback.
> It includes the following changes: [...]
> Top Ten Reasons to Upgrade to FreeBSD 13.2, History never repeats but sometimes it rhymes, Wayland on OpenBSD, OpenBGPD 8.1 released, Shoot yourself in the foot, Zenbleed: aka: The new fun for a while, and more
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