Linux rdev command details how to use the Linux rdev command

The Linux rdev command can be used to query/set the root device of the kernel image file, RAM disk size or video mode.

The rdev command without any parameters will output the/etc/mtab file line of the current root file system. Ramsize, vidmode, and rootflags without any parameters are displayed.

Syntax

Rdev [-rsvh] [-o offset] [image [value [offset] </p>

However, as the user wants to set different parameters, the following method is the same:

Rdev [-o offset] [image [root_device [offset]

Swapdev [-o offset] [image [swap_device [offset]

Ramsize [-o offset] [image [size [offset]

Videomode [-o offset] [image [mode [offset]

Rootflags [-o offset] [image [flags [offset]

Parameters:

-R: run rdev as ramsize.

-R: enables rdev to run as rootflags.

-V: enables rdev to run as vidmode.

-H: help.