Memtest tool

[hanasaki]

I recently installed and booted Conectiva Linux.  The install had a neat 
memory test tool in the boot menu.  It looks like it is a Kernel that 
just runs RAM / CPU Cache testing.  There is an entry in the Grub config 
to boot it just like a kernel.

Is there any such tool for debian?  How does this compare with the 
memtest program in sysutils?

Thank you.

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