http://www.kernel.org/pub/dist/superrescue/v2/SRPMS/

more infomation

$ rpm -qi killramdisk
Name        : killramdisk                  Relocations: (not relocateable)
Version     : 1.0                               Vendor: (none)
Release     : 2_7.x                         Build Date: xxx
Install date: xxx                           Build Host: xxx
Group       : System Environment/Base       Source RPM: killramdisk-1.0-2_7.x.src.rpm
Size        : 3360                             License: GPL
Summary     : A utility to free the contents of a ramdisk
Description :
This is a small utility to free the memory occupied by a ramdisk device.
$
$ rpm -ql killramdisk
/sbin/killramdisk
$


example site(usage) :
http://www.georgetoft.com/linux/firewall/