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This article mainly introduces linux how to create a certain size file, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

Linux create file command: dd command

Copies the specified input file to the specified output file, and the format can be converted during the copy process. Syntax:

CODE: [Copy to clipboard] dd (option)

QUOTE:

If = enter the file (or device name).

Of = output file (or device name).

Ibs = bytes reads bytes bytes at a time, that is, the number of bytes read into the buffer.

Skip = blocks skips the ibs*blocks block at the beginning of the read-in buffer.

Obs = bytes writes bytes bytes at a time, that is, the number of bytes written to the buffer.

Bs = bytes also sets the number of bytes in the read / write buffer (equal to setting obs and obs).

Cbs = bytes converts bytes bytes at once.

Count = blocks copies only the input blocks blocks.

Conv = ASCII converts EBCDIC codes to ASCII codes.

Conv = ebcdic converts ASCII codes to EBCDIC codes.

Conv = ibm converts ASCII codes to alternate EBCDIC codes.

Conv = blick converts variable bits to fixed characters.

Conv = ublock converts the fixtures into motions.

Conv = ucase changes letters from lowercase to uppercase.

Conv = lcase changes letters from uppercase to lowercase.

Conv = notrunc does not truncate the output file.

Conv = swab swaps each pair of input bytes.

Conv = noerror does not stop processing when there is an error.

Conv = sync adjusts the size of each input record to the size of ibs (filled with ibs).

Fdformat command

Low-level formatted floppy disk.

Example:

Create an empty file of 100m

Dd if=/dev/zero of=hello.txt bs=100M count=1

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