This is what I have so far in Bash-CodePudding

This is what I have so far Help, I am new to bash #!/bin/bash" while true; do read -p "Please Enter Username : " Admin read -p "Please Enter Username again : " Username if [[ "$Username" == "$Admin" ]] then echo "Username is Correct" break; else printf "Username is Wrong" fi done while true; do echo -n "Enter a password: " read -s firstpassword echo read -p "Retype a password: " secondpassword echo if [ $firstpassword == $secondpassword ]; then echo "Password is correct." break; else printf " Password is wrong." fi done

CodePudding user response：

#!/bin/bash
while true; do
    read -p "Please Enter Username: " Admin
        read -p "Please Enter Username again: " Username
        if [[ "$Username" == "$Admin" ]]
        then
            echo "Username is Correct"
            break;
        else 
        printf "Username is Wrong\n"
    fi
done
password="1234"
n=0
function login() {
n=$((n 1))
if (( $n > 3 ))
then
    echo "To many attempts, terminating.."
    return 0
else

    echo -n "Enter the password: "
    read pwd
    if [ $password = $pwd ]
    then
        echo "Password is correct"
    else
        echo "Password is incorrect!"
        login
    fi
fi
}
login

If you wanted to check username also by 3 attempts then

#!/bin/bash
n=0
function login() {
n=$((n 1))
read -p "Please Enter Username: " Admin
read -p "Please Enter Username again: " Username
if [[ "$Username" == "$Admin" ]]
then
    echo "Username is Correct"
    n=0
    password
else
    if (( $n >= 3 ))
    then
        echo "Too many wrong attempts, terminating.."
        return 0
    else
    printf "Username is Wrong\n"
    login
    fi
fi
}
function password() {
password="1234"
n=$((n 1))
if (( $n > 3 ))
then
    echo "Too many attempts, terminating.."
    return 0
else
    echo -n "Enter the password: "
    read pwd
    if [ $password = $pwd ]
    then
        echo "Password is correct"
    else
        echo "Password is incorrect!"
        password
    fi
fi
}
login