I run docky which is programmed with mono so I think the binfmt is running correctly, but proc-sys-fs-binfmt_misc.automount complains about it, since I don't have /proc/sys/fs/binfmt_misc/CLR

I already have CONFIG_BINFMT_MISC=y in my kernel config.


/proc/sys/fs/binfmt_misc/CLR gets created by the kernel when you register a binary format that you've named "CLR". Are you able to register one manually?

echo ':CLR:M::MZ::/usr/bin/mono:' | sudo tee /proc/sys/fs/binfmt_misc/register

If this works, then the solution is probably that you should add a file in /etc/binfmt.d; see man binfmt.d for more information.

Are you sure systemd is complaining about it not already being there? systemd's systemd-binfmt.service is supposed to do that for you (but I think it does need that config file in order to do it).

  • Thanks for the heads up, I thought CLR was a standard interface that means something ... And the problem is that I disabled auto-mount in kernel, now it's resolved – daisy Nov 27 '12 at 4:00

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