+ zstd -h
Usage: zstd *OPTION*... *FILE*... *-o file*
Compress or uncompress FILEs (with no FILE or when FILE is `-`, read from standard input).

  -o file              result stored into `file` (only 1 output file)
  -1 .. -19            compression level (faster .. better; default: 3)
  -d, --decompress     decompression
  -f, --force          disable input and output checks. Allows overwriting existing files,
                       input from console, output to stdout, operating on links,
                       block devices, etc. During decompression and when the output
                       destination is stdout, pass-through unrecognized formats as-is.
      --rm             remove source file(s) after successful de/compression
  -k, --keep           preserve source file(s) (default)
  -D DICT              use DICT as Dictionary for compression or decompression
  -h                   display usage and exit
  -H,--help            display long help and exit

+ zstd -H
...
Advanced options :
...
+ zstd --help
...
Advanced options :
...
