UNIX for Dummies Questions & Answers

 echo "Enter The Login Name:"
read username
echo "Enter The Password:"
read password

if [[ $username == "user"  && $password == "password" ]]
then
  echo -e "You're Logged In\n"
elif [ $username != "user" ] 
then
  echo -e "Invalid User Name\n"
else
  echo -e "Invalid Password\n"
fi

case $username in
    alex ) pass=alex2;;
    sean ) pass=sean2;;
    ashley ) pass=ashley2;;
    # *) echo "error"
esac

#!/bin/sh

echo "Enter login name and password"
read trythis

if [ $trythis = "Aarin_dtfc" ]
then
	echo "You are logged in!"
else [ $trythis = "Aarin_*" ]
	echo "Wrong password!"
	exit 1
else [ $trythis = "*_dtfc" ]
	echo "Login name is not recognized!"
	exit 2
fi
exit 0

#!/bin/sh
echo "Enter username"
read username
if [ $username = "Aarin" ]
then  
 echo Enter password
 read password
case $username in
 Aarin ) pass=dtfc;;
 Rick ) pass=unpo
esac
while [ "$password" != "$pass" ]; do
 echo "Wrong password!"
 return 1
done
echo "You are logged in!" 
return 0
else
 echo "Login name not recognized"
fi
return 2

#!/bin/bash
clear
echo "          		1 = Login

      			2 = Change the Login Password

			3 = Forgot your password?

			4 = Set the recall answer to question
"
	read number
	case $number in
	1)
	      if [ -s /home/alex/Documents/PASS/password_PASS ]; then
			    existpass=`cat /home/alex/Documents/PASS/password_PASS`
			    echo "Type the existing pass:"
			    read givenpassasexisted
		         if [ "$existpass" = "$givenpassasexisted" ]; then
			  	clear; echo "Success!"
		         else    	echo "Bad" 
			          exit
			 fi
		else echo "There is no password."
		
	fi;;
		
	2)
		   if [ -s /home/alex/Documents/PASS/password_PASS ]; then
			    existpass=`cat /home/alex/Documents/PASS/password_PASS`
			    echo "Type the existing pass:"  
				read givenpassasexisted
		         if [ "$existpass" = "$givenpassasexisted" ]; then
				echo "Type new password:"
				read newpass
				echo "Type again to confirm:"
				read newpass2
				if [ "$newpass" = "$newpass2" ]; then
		  		cd /home/alex/Documents/PASS/
				rm password_PASS
				echo $newpass > /home/alex/Documents/PASS/password_PASS
				echo $newpass > /home/alex/Documents/PASS/bringagain_PASS
				else clear; echo "Confirmation failure!"; exit
				fi
			else
				clear; echo "Wrong password!"
			fi
		  else echo "there is no password file.Create one plz."
			fi;;
	3)
		
		echo "Which is your best friend?"
		read maybebestfriend
		  realbestfriend=`cat /home/alex/Documents/PASS/recallquestion_PASS`
		if [ "$maybebestfriend" = "$realbestfriend" ]; then
			recall=`cat /home/alex/Documents/PASS/bringagain_PASS`
			echo "The password which you forgot is $recall"
		else 
			clear; echo "Wrong answer to the question which is your best friend.Try again."
		fi;;
		
	4)
		echo "Which is the current password?"
		read givenpassasexisted
			existpass=`cat /home/alex/Documents/PASS/password_PASS`
		         if [ "$existpass" = "$givenpassasexisted" ]; then
			 echo "Which is your best friend?"
			 read bestfriend
			 echo $bestfriend > /home/alex/Documents/PASS/recallquestion_PASS
		else 
			echo "Wrong password.Try again!"
			fi
		
	esac

#!/bin/sh
echo "Enter username" 
while : 
do
 read username
 case $username in 
  Aarin | Rick | Zach | Ashley | Alex | Nik | Wilbur ) 
   echo "Enter password" 
   break ;; 
  * ) echo Username fail. Try again. ;;
 esac
done
case $username in
 Aarin ) pass=dtfc;;
 Rick ) pass=up;;
 Zach ) pass=btiom;;
 Ashley ) pass=cayh;;
 Alex ) pass=quixotic;;
 Nik ) pass=stbm;;
 Wilbur) pass=xmomx;;
esac
read password
while [ "$password" != "$pass" ]; do
 echo "Password fail. Try again."
 read password
done
echo "You Are Logged In!"
return 0