how to restart userland?

[Tomas Szepe]

Hi,

Would anyone know of a proven way to completely restart the userland
of a Linux system?

i.e. something like
# echo whatever-restart >/proc/wherever

Killing all processes.
Killing init.
Unmounting all filesystems.
VFS: Mounted root (ext2 filesystem).
INIT: v2.84 booting
...

Thanks for any pointers,
-- 
Tomas Szepe <szepe@xxxxxxxxxxxxxxx>
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