It seems you're asking for a of a tool used to create an SSH ramdisk for the iPhone 4 .
First, a crucial note: The iPhone 4 is obsolete (A4 processor, iOS 4–7.1.2). Modern jailbreaks for it are permanent and untethered, so you don't need a ramdisk for normal jailbreaking. iphone 4 ssh ramdisk tool
That said, such tools are still used by forensic analysts, data recovery specialists, and tinkerers who want to access the filesystem without booting iOS. It seems you're asking for a of a
