| Headlines |
| 2024-09-11 |
How to make NetBSD immutable |
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The NetBSD operating system is lightweight and incredibly portable, able to run on a long list of CPUs with minimal resources. This sort of operating system is ideal for read-only, embedded devices, but how does one go about making NetBSD immutable? Stefano Marinelli has the answer: "Although NetBSD doesn’t provide native read-only support, it’s flexible enough to allow for this configuration. Many years ago, I followed a how-to to set up a read-only system, and the idea remains simple and effective: NetBSD writes primarily to specific locations, unlike some Linux distributions that attempt to write to various parts of the file system. On NetBSD, the main write targets are the /tmp directory and /var. With this in mind, we can configure these directories to reside in memory file systems (mfs) and ensure that /var contains everything necessary for the system to function correctly." Marinelli goes on to share a tutorial for setting up NetBSD to be read-only, ideal for situations where we need a reliable, embedded operating system. |
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