Linux compatibility with more than one Linux installed?

Alexander Leidinger Alexander at
Tue Dec 6 11:23:20 UTC 2011


this description looks a little bit short to me. A more detailed description is available at


Send via an Android device, please forgive brevity and typographic and spelling errors. Zhihao Yuan <lichray at> hat geschrieben:On Tue, Dec 6, 2011 at 3:53 AM, Thomas Mueller
<mueller6727 at> wrote:
>> The X server has a unix socket somewhere in /tmp. Normally this is used instead of a TCP connection to the localhost. You need to change the DISPLAY
>> env-variable to use a TCP connection, or you need o make the unix socket available to the chrooted linux-env.
>> The linuxulator in FreeBSD is nearly linux 2.6.16 compatible. We lack inotify and epoll support which the 2.6.16 kernel normally supports. If your system does
>> not depend upon inotify, epoll and anything newer than 2.6.16, it should work. If you give it a try, please report success or failure to
>> emulation at
>> Bye,
>> Alexander.
> Now I might have something to try, but it is very unlikely that I would build a Linux kernel <= 2.6.16, especially with new hardware that might need the latest drivers.  I will primarily want to run Linux natively rather than under FreeBSD.
> I think emulators/linux_dist-gentoo-stage3 and emulators/linux_base-gentoo-stage3 must use kernel far beyond 2.6.16.
> But I think, when chrooting into Linux from FreeBSD, FreeBSD kernel is the one in effect.

Not really. The actual thing is, linuxulator is a Linux kernel running
as a FreeBSD kernel module. The only thing FreeBSD kernel do is to
identify the Linux program and to pass it to the Linux kernel. To the
Linux programs inside a GNU chroot enviroment, they think they are
running inside a Linux box and actually they are running inside a
Linux box. To the Linux programs running under a FreeBSD base, they
may identify that the base is not GNU by invoking some external
programs like `uname`. However, we can replace their sh with
/compat/linux/bin/sh, so that they are blind again.

> Tom
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Zhihao Yuan, nickname lichray
The best way to predict the future is to invent it.
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