Usage: peekfd [-8] [-n] [-c] [-d] [-V] [-h] <pid> [<fd> ..]
    -8, --eight-bit-clean        output 8 bit clean streams.
    -n, --no-headers             don't display read/write from fd headers.
    -c, --follow                 peek at any new child processes too.
    -t, --tgid                   peek at all threads where tgid equals <pid>.
    -d, --duplicates-removed     remove duplicate read/writes from the output.
    -V, --version                prints version info.
    -h, --help                   prints this help.

  Press CTRL-C to end output.