How to enter password as hidden characters in shell script

This article introduces to you how to enter passwords in the form of hidden characters in shell scripts. Let’s take a look at the specific content.

Let’s first look at the command

read -s -p “Enter Password: ” pswd

How to use:

If you want to enter the password in the shell script. You probably don't want any characters entered by the user to be displayed on the screen. Use -s for silent mode. Characters entered using -s will not be echoed. For example, create a shell script named inputpwd.sh and add the following content.

$ vim inputpwd.sh

#!/bin/bash
### Input password as hidden charactors ### 
read -s -p "Enter Password: "  pswd
### Print the value of pswd variable ### 
echo -e "\nYour password is: " $pswd

Let's execute the script and enter the password, you just enter the password and the characters will not be displayed on the screen. This only works with the /bin/bash shell, older shells (/bin/sh) will throw an error.

Let's execute the script and enter your password, you just enter your password and no characters will appear on the screen. This only works with /bin/bash shell, older shells (/bin/sh) will throw errors.

# chmod +x inputpwd.sh
# ./inputpwd.sh
Enter Password:
Your password is:  9kjdfk329sksk

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