Shell Programming and Scripting

The pro help!
Write a shell script setup for linux security policies include:
1. login (username and password login).
2. add, delete your username and password.
3. firewall.
Note: Write a shell script file as follows:
If login successful then
Step 2.
If step 2 succeeds (ie add, delete success) then
Step 3
End.

---------- Post updated at 10:28 PM ---------- Previous update was at 06:54 PM ----------

Can anyone help me with a bash shell login script? Its for my unix class and we need to make a script that allows the users we create to login on a screen and put their user name and password on it. Then from that screen it goes to a menu screen IF they put the right login/password combination.

Heres what i have so far.

Code:

tput cup $1 $2
tput clear
bold=`tput smso`
offbold=`tput rmso`
echo $bold
tput cup 10 20; echo "User ID:"
tput cup 12 20; echo "Password:"
echo $offbold
tput cup 10 41; read userid
tput cup 12 41; read password
while [ "$userid" != "/etc/passwd" ]; do
	echo $bold
	tput cup 15 35; echo "Incorrect User/Password"
	echo $offbold
     if	[ "$userid" = "/etc/passwd" ];
	then
	clear
	./companymenu; 
     fi
done

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