please, i need explanation about tmpfs, devfs and randisk!!!
 

please, i need explanation about tmpfs, devfs and randisk!!!

swap - virtual memory (in disk).

is for switching data between RAM and DISK when RAM finish/congested.
this is right?

tmpfs - is one virtual memory filesystem.
what more? what is do?


Devfs - Is one Device Filesystem.
what more? what is do?


and ramdisk ? what's this? what is do?


all help is welcome.
thanks in advance for you attention!!!

A ramdisk is basically using memory to simulate a hard disk. Tmpfs is a filesystem that's been optimized to with a ramdisk as opposed to a physical disk backing it. Devfs is for device nodes. As you said, swap allows the kernel to page data oiut of main memory and onto the disk when main memory is getting full.