gistfile1.txt

#!/bin/bash
exec 3<> /dev/tcp/${1:-localhost}/4949

 printf "list" >&3
 printf "\r\n" >&3

  while read LINE <&3
      do
        for i in $LINE
                do
                    while read var <&3
                    do
                        printf "fetch $i" >&3
                    echo $var
                done
                done
                done