Technology with a focus on Open Source
The short story There is an unbelievable security flaw in all major browsers that exposes your public and local IP to websites if you have WebRTC and Javascript enabled, which is the default. In particular, this exposes users trying to anonymize their browsing through VPNs, Tor or I2P. This has been known since 2015 and …
We already covered how Linux executes files and how to run ARM binaries “natively” in Linux in the last two posts. We ended up running a whole ARM root filesystem transparently in a chroot jail using QEMU user mode and binfmt_misc support. Now that we have that covered, nothing prevents us from applying that to …
What? you can do that in Linux? It turns out you can! First, let’s see it in action. Here I retrieve a binary from my Raspberry Pi which is an ARM binary and execute it in my x86_64 machine transparently. If you try to do this… it won’t work right away.
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$ ./echo zsh: exec format error: ./echo |
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The latest release of NextCloudPi is out! The key improvement is bringing fully automating Nextcloud updates. This was the last piece of the puzzle, and finally we can leave the board just sitting there and everything will be automatically be kept up to date: Debian packages, Nextcloud and NextCloudPi itself. Also, work has been focused …
What happens when a file gets executed in Linux? What does it mean that a file is executable? Can we only execute compiled binaries? What about shell scripts then? If I can execute shell scripts, what else can I execute? In this article we will try to answer those questions. What involves executing a …
These instructions are for Raspberry Pi 2 – 3 B+. Feel free to re-design for your device! After discovering the NextcloudPi project back on the release of Version 12, I realized one thing was still missing… a case! Thankfully I have a background working with vector graphics and a lasercutter at my local hackerspace, Noisebridge. …
This is a little compilation of some useful configuration options and basic methods to debug a Linux kernel. There is good documentation in kernel.org and elsewhere but back when I was learning these things I felt that there are few places where you can get a high level overview. We will go through more advanced …
How much space is this file taking from my hard drive? How much free space do I have? How many more files can I fit in the remaining free space? The answer to these questions seems obvious. We all have an instinctive understanding of how filesystems work, and we often picture storing files in disk …
The latest release of NextCloudPi is out! Work has been focused on improving user experience during the first setup, and bringing more power to the docker container and ncp-web. Also there is some news! NextCloudPlus improves everyday thanks to your feedback. Please report any problems here. Also, you can discuss anything in the forums. Last …
Can people send you files without needing a Nextcloud account? Yes. Disclaimer: This is a fun idea, but we assume no responsibility, nor liability, for anyone who chooses to follow these directions. If you are okay with that, read on… I do love mystery boxes, and there is no time like the present to …