RAM(4) Linux Programmer's Manual RAM(4)

ram - ram disk device

The ram device is a block device to access the ram disk in raw mode.
It is typically created by:

mknod -m 660 /dev/ram b 1 1
chown root:disk /dev/ram

/dev/ram

chown(1), mknod(1), mount(8)
1992-11-21 Linux