dd Command Generator

## What is dd?

The `dd` command copies data at the block level. It is the standard tool for disk imaging, writing ISO files to USB drives, erasing devices with `/dev/zero`, and rescuing data from failing media. Unlike most commands, `dd` uses `operand=value` syntax rather than flags.

## How to Use

1. **Set `if=`**: Specify the input file or device (e.g., `/dev/sda`, `img.iso`). 2. **Set `of=`**: Specify the output file or device (e.g., `disk.img`, `/dev/sdb`). 3. **Tune Transfer**: Set `bs=` (block size), `count=`, `conv=`, and `status=` as needed. 4. **Copy & Run**: Paste the generated command into your terminal. `dd` writes directly — verify devices before pressing Enter.

### `if=FILE` Input file

The source to read from. Defaults to standard input if omitted.

### `of=FILE` Output file

The destination to write to. Defaults to standard output if omitted.

### `bs=BYTES` Block size

Read and write this many bytes per block (e.g., `4M`, `1K`, `512`). Larger blocks are usually faster for whole-disk copies.

### `count=N` Block count

Copy only N input blocks, then stop. Useful for sampling or creating fixed-size files.

### `skip=N` / `seek=N`

`skip=N` skips N input blocks before reading; `seek=N` skips N output blocks before writing. Use them to copy to/from an offset.

### `conv=LIST` Conversions

Comma-separated transforms: `noerror` (continue on read errors), `sync` (pad blocks), `fsync` (flush to disk before finishing), `notrunc` (do not truncate output).

### `status=LEVEL` Progress

Controls transfer output: `progress` (show periodic stats), `noxfer` (stats only at end), `none` (silent).