Dd: Copy a file with a block of the specified size and perform the specified conversion while copying.
Note: If the specified number ends with the following characters, multiply the corresponding number: b=512; c=1; k=1024; w=2
parameter:
1. if=filename: Enter the file name, the default is standard input. That is, specify the source file. < if=input file >
2. of= file name: output file name, the default is standard output. That is, specify the destination file. <of=output file >
3. ibs=bytes: Read bytes bytes at a time, that is, specify a block size of bytes.
Obs=bytes: Outputs bytes bytes at a time, that is, specifies a block size of bytes.
Bs=bytes: Set the read/output block size to bytes at the same time.
4. cbs=bytes: Convert bytes bytes at a time, that is, specify the conversion buffer size.
5. skip=blocks: Skips the blocks from the beginning of the input file before starting the copy.
