SHELL SCRIPT to generate random PASSWORD and CAPTCHA

1). create a file named "password.sh"

 

#!/bin/bash

while :

do

    clear

    cat<<EOF

                ===================

                PASSWORD GENERATOR:

                -------------------

            Enter the (P)assword length

            Enter the (C)aptcha length

                      (Q)uit

                -------------------

EOF

    read -n1 -s

    case "$REPLY" in

    "E")

    echo -e -n "\n\t: "

    read b

    a=$(tr -dc "A-Za-z0-9~!@#$%^&*-_" < /dev/urandom | head -c$b)

    echo -e "\n\n\t\t$a"

    ;;

    "C")

    echo -e -n "\n\t: "

    read b

    echo -e "\n\n\t\t" `/usr/bin/shuf -i 1-$b -z`

    ;;

    "Q")  exit 0                    ;;

    "q")  echo "case sensitive!!"   ;;

    "c")  echo "case sensitive!!"   ;;

    "e")  echo "case sensitive!!"   ;;

    esac

    sleep 2

done

2). copy & paste the below code in file: password.sh

3). chmod 755  password.sh

4). ./password.sh

output:

for PASSWORD:

 for CAPTCHA:

Press Q (not "q") to exit.

=========================
Simple script for only PASSWORD:
=========================

 #!/bin/bash
b=$1
if [ $# -gt 1 ] || [ $# -eq 0 ]
then
echo "Enter the password length:"
read b
a=$(tr -dc "A-Za-z0-9~!@#$%^&*-_" < /dev/urandom | head -c$b)
echo "$a"
else
a=$(tr -dc "A-Za-z0-9~!@#$%^&*-_" < /dev/urandom | head -c$b)
echo "$a"
fi
=========================