dd ---> data duplication command powerful command to manipulate copying " dd if=first.txt of=second.txt"

 dd [if=input_file] [of=output_file] [bs=block_size] [count=num_blocks]

• if: Specifies the input file. This can be a regular file, a device (e.g., /dev/sda), or other data source. If not provided, dd will use standard input.
• of: Specifies the output file. This can be a regular file, a device, or other data destination. If not provided, dd will use standard output.
• bs: Sets the block size for data transfer. You can specify values like 1K, 4M, etc.
• count: Specifies the number of blocks to copy.
• skip: Skips a specified number of blocks before starting to copy data.
• seek: Skips a specified number of blocks in the output file before writing data.
• conv: Used for data conversion, such as changing the character encoding or converting uppercase to lowercase.
• status: Shows the progress of the dd command.