Detailed explanation of DD commands to create a certain size file in Linux

This article explains how to create a file in Linux: dd. Use the DD Linux Command to create a certain size file.

Linux File Creation command: dd command

Copy the specified input file to the specified output file, and convert the format during the copy process. Syntax:

Code: [copy to clipboard] dd [Option 〕

Quote:

If = input file (or device name ).

Of = output file (or device name ).

IBS = Bytes: the number of bytes read from the buffer zone.

Skip = blocks skip the IBS * blocks block at the beginning of the read buffer.

Obs = Bytes: the number of bytes written into the buffer zone.

BS = Bytes: set the number of bytes in the read/write buffer at the same time (equal to setting obs and OBS ).

CBS = Bytes: converts bytes at a time.

Count = blocks only copies the input blocks block.

Conv = ASCII converts an ebcdic code to an ascii code.

Conv = ebcdic converts ASCII code to ebcdic code.

Conv = IBM converts ASCII code to alternate ebcdic code.

Conv = blick converts a variable bit to a fixed character.

Conv = ublock converts a fixed user to a variable bit

Conv = ucase converts lowercase letters to uppercase letters.

Conv = lcase converts uppercase letters to lowercase letters.

Conv = notrunc: the output file is not truncated.

Conv = swab exchange each pair of input bytes.

Conv = do not stop processing when noerror occurs.

Conv = Sync adjusts the size of each input record to the IBS size (filled with IBS ).

Fdformat command

Low-level formatting floppy disk.

Instance:

Create a m empty file

Dd If =/dev/Zero of=hello.txt BS = 100 m COUNT = 1

The preceding command is used to create a file in Linux: dd.