decision=yes

while [[ $decision = 'yes' ]]; do


read -p "please, enter the users first name: " fname

read -p "please, enter the users last name: " lname

read -p "please, enter the users initial group: " igroup

read -p "please, enter any additional groups the user belongs to: " agroup


igroupl=$(tr '[:upper:]' '[:lower:]' <<<"$igroup")

agroupl=$(tr '[:upper:]' '[:lower:]' <<<"$agroup")

lnameu=$(tr '[:lower:]' '[:upper:]' <<<"$lname")

fnameu=$(tr '[:lower:]' '[:upper:]' <<<"$fname")

usrnm1=$(tr '[:upper:]' '[:lower:]' <<<"$lname")

usrnm2=$(tr '[:upper:]' '[:lower:]' <<<"${fname:0:1}")

usrnm=$usrnm1$usrnm2


if getent passwd "$usrnm" >/dev/null; then

for ((i=1;;i++)); do

getent passwd "$usrnm$i" >/dev/null || { usrnm=$usrnm$i; break; };

done;

fi


useradd -c "$fnameu $lnameu" -g "$igroupl" -g "$agroupl" "$usrnm"

echo password01 | passwd "$usrnm" --stdin


read -p "would you like to add another user?(yes/no): " yesno

decision=$(tr '[:upper:]' '[:lower:]' <<<"$yesno")


doneloop=1
    while ((doneloop == 1)); do

if [[ $decision = 'yes' ]]; then

decision=yes

doneloop=2

elif [[ $decision = "no" ]]; then

echo "thank you for using this program"

doneloop=2

else

echo "please use a correct option.(yes/no): "

read yesno

decision=$(tr '[:upper:]' '[:lower:]' <<<"$yesno")

fi

done

done