Linux Interactive Shell Scripting

Last week i saw interactive shell running in the juju-quickstart . It is really cool.So i search about interactive shell scripting techniques available in Linux.So i found one of the famous method is "Whiptail" . Basically these scripting used for displaying dialog boxes which used to get user Inputs.So I have created Sample Interactive shell Scripting using dialog boxes.

First Screen Start with Menus.

This is the confirm box with yes / no option.

 This is the Password box. In this script i have put another Input box.

This is the Progress bar in "whiptail".Here i will put the bash script file.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85

#!/bin/bash # Whiptail is the interactive shell Scrpting OPTION=$(whiptail --title "Whiptail Shell Script Menu" --menu "Choose your option" 15 60 4 \ "1" "Change Password" \ "2" "Change UserName" \ "3" "Change Email" \ "4" "exit" 3>&1 1>&2 2>&3) exitstatus=$? if [ $exitstatus = 0 ]; then echo "Your chosen option:" $OPTION case $OPTION in 1) echo "Option1 Selected" if (whiptail --title "Change Password" --yes-button "Yes" --no-button "No" --yesno "Do you need to changed Password ?" 10 60) then echo "password Selection Yes$?." # Start Password Box PASSWORD=$(whiptail --passwordbox "please enter your secret password" 8 78 --title "Change Password" 3>&1 1>&2 2>&3) # A trick to swap stdout and stderr. # Again, you can pack this inside if, but it seems really long for some 80-col terminal users. exitstatus=$? if [ $exitstatus = 0 ]; then echo "User selected Ok and entered " $PASSWORD touch sample_out_put.txt echo $PASSWORD > sample_out_put.txt # Start Progress Bar { for ((i = 0 ; i <= 100 ; i+=5)); do sleep 0.3 echo $i done } | whiptail --gauge "Password Updating.." 6 50 0 # End Progress Bar else echo "User selected Cancel." fi # End Password Box else echo "Password Selection No$?." fi ;; 2) echo "option2 Selected" # Change User Name Box NAME=$(whiptail --inputbox "Change Username " 8 78 --title "Changed UserName" 3>&1 1>&2 2>&3) exitstatus=$? if [ $exitstatus = 0 ]; then echo "UserName Changed " $NAME if (whiptail --title "Confirm Change UserName" --yes-button "Yes" --no-button "No" --yesno "Do you need to changed UserName ?" 10 60) then echo "Username Confirm Yes$?." # Start Progress Bar { for ((i = 0 ; i <= 100 ; i+=5)); do sleep 0.3 echo $i done } | whiptail --gauge "UserName Updating.." 6 50 0 # End Progress Bar else echo"Confirm Failed" fi else echo "UserName Not Changed" fi ;; 3) echo "Option3 Selected" ;; 4) echo "exit" { for ((i = 0 ; i <= 100 ; i+=5)); do sleep 0.1 echo $i done } | whiptail --gauge "exit..." 6 50 0 esac else echo "You chose Cancel." fi

And Happy Coding....