String Manipulation in Shell Scripting

Create a password generator using shell scripting

Last Updated : 19 Jul, 2019

Creating a strong password is often a time-consuming task and even after creating a good password by yourself it gets brute-forced by hackers. In this article, we will learn how to create a strong password which fulfills all requirements including symbols, capitals length etc using a simple shell script in Linux. How to create a password generator using shell script ? This a simple short and quick method, just open the nano editor with .sh file using this command -

nano passwdgen.sh

You can use any name of the file.

Python3

#!/bin/bash

# this can be anything of your choice
echo "Welcome to simple password generator" 

# ask the user how much long should be
echo "please enter the length of the password"  

# read the input given by user and store in variable
read  PASS_LENGTH 

# loop will create 5 passwords according to
# user as per length given by user                        
for p in $(seq 1 5);                                   
do 
    openssl rand -base64 48 | cut -c1-$PASS_LENGTH 
done

Save the file and give executable permission using sudo chmod +x command and run the script. Output:

String Manipulation in Shell Scripting

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Madhusudan_Soni

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