Creando usuario con script bash con argumentos

Question

Estoy intentando crear un script que convierta a un usuario ftp, pero sigue fallando y no sé por qué. Si hago eco del comando, está bien y puedo copiarlo y pegarlo para crear el usuario, pero si ejecuto el comando en el script bash, no se puede crear el usuario.

El único error que recibo es la sección de ayuda del comando useradd.

¿Alguien sabe qué estoy haciendo mal?

#!/bin/bash
# at the top are all the functions  at the bottem is the execution order
username() 
{
echo Enter the username.
read USERNAME
echo 
echo 
echo 

if [ -n "$USERNAME" ]; then
        :
        else
            echo "You didn't supply a username"
            username
         exit 1
fi
echo "the username you have selected is " $USERNAME
read -p "Is this the username you would like to use? Yy/Nn  " yn
case $yn in
    [Yy]* ) echo ;;
    [Nn]* ) username;;
    * ) echo "Please answer yes or no."; username;;
 esac
  }
groups()
{
groeps=($(cat /etc/group | grep ftponly))  #productie
#groeps=($(cat group | grep ftponly))  #local test
read -p "$(
         f=0
        for groepname in "${groeps[@]}" ; do
            # echo "$((++f)): $groepname"
     echo "$((++f)): ${groepname:0:8}"
    done


    echo -ne 'Please select the groep you would like to use > '   
 )" selection

selected_groep="${groeps[$((selection-1))]}"
echo "you have selected " ${selected_groep:0:8}
read -p "is this the right group? Yy/Nn  " yn
case $yn in
[Yy]* ) echo " " ;;
[Nn]* ) groups;;
* ) echo "Please answer yes or no."; groups;;
esac
}

 ticket()
{
echo "Enter the ticket number"
read TICKET
echo 
echo 
if [ -n "$TICKET" ]; then
    :
        else
    echo "you didnt supply a ticket number, to execute this you need to have a ticket number."
    ticket
fi
}
endcommand() 

{
echo  
echo 
DIR=/data/xchangeremote
final="/usr/sbin/useradd -g ${selected_groep:10:4} -c \"$USERNAME + $TICKET\" -d $DIR/./\"$USERNAME\" -s /usr/sbin/nologin \"$USERNAME\""
echo $final
echo "To check if the command is correct see example on: "

read -p "is the command correct now? Answer with: Yy/Nn " yn
    case $yn in
            [Yy]* ) echo ;;
            [Nn]* ) echo "please enter the correct username"; username; groups; ticket; endcommand;; 
            * ) echo "Please answer yes or no."; endcommand;;
     esac
PASSWORD=$(< /dev/urandom tr -dc '1234567890!@#$%qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM' | head -c12; echo "")
echo " the password for this account will be" $PASSWORD 
$final
$USERNAME:$PASSWORD | chpasswd
}
#here are the functions called
username
groups
ticket
endcommand

Answer 1

cambiar;

$final

a;

eval "$final"