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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Linux-hardened and Flatpak, Distrobox, Podman, Docker (feddit.de)

submitted 1 year ago by Pantherina@feddit.de to c/linux@lemmy.ml

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Hi guys!

I am currently trying Arch in a VM and I like it a lot. Wanted to try the hardened kernel all the time, but it has the problem of forbidding custom namespaces.

Tbh I dont even know what that is, but on arch, installing bubblewrap-suid fixes the flatpak problem.

I could not find such a package for Podman, which is used as backend (?) in Distrobox.

Is there a way to make Podman, Docker, Distrobox, Toolbox work on linux-hardened?

This is a big requirement for making a Fedora Atomic version using the hardened kernel, which sounds great, as they completely rely on these containers.

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[–] alt@lemmy.ml 11 points 1 year ago

Basically, you want to not disable kernel.unprivileged_userns_clone.

For a temporary solution that has to be redone after reboot, there is sysctl kernel.unprivileged_userns_clone=1.

For a lasting solution, consider echo kernel.unprivileged_userns_clone=1 | sudo tee /etc/sysctl.d/99-enable-unpriv-userns.conf.

In either case you're foregoing security for the sake of convenience/functionality, so I understand why you would rather not act upon either of them.

I don't know what the solution is that would be analogous to installing bubblewrap-suid. Perhaps, it's worth exploring the projects found within the github page of Awesome Fedora Security for some pointers.