Backup your CMOS from Linux

I just had to backup a remote CMOS from a remote server to a local machine. How do you do this, without going to the datacenter?

Backup

modprobe nvram
cat /dev/nvram > /etc/nvram.conf

Restore

modprobe nvram
cat /etc/nvram.conf > /dev/nvram

Warning

This method probably only works if the hardware is exactly the same and the bioses of both systems have the exact same version.

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