LinuxQuestions.org - [SOLVED] Shell scripting

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Hi everyone,

I am A.chandrasekhar, a beginner of Linux admin and i want to study
shell scripting, please any one can help me how to write a script?

1. Write a shell script it needs to create a user with necessary fields like firstname,lastname,username,password,confirm pwd, and here
we have some conditions like pwd and confirm pwd doesnot match it needs to print pwd doesnot match and later user will create.

Please help me out to write this script in a easy way, so i can understand easily as a beginner.

Thanks & Regards,
A.Chandrasekhar

please post the code that you have written so far and we will help debug.

Quote:

Originally Posted by sekhar.hai (Post 5193114)

Hi everyone,
I am A.chandrasekhar, a beginner of Linux admin and i want to study shell scripting, please any one can help me how to write a script?

1. Write a shell script it needs to create a user with necessary fields like firstname,lastname,username,password,confirm pwd, and here we have some conditions like pwd and confirm pwd doesnot match it needs to print pwd doesnot match and later user will create.

Please help me out to write this script in a easy way, so i can understand easily as a beginner.

Please read the LQ Rules about posting verbatim homework questions. And yes, we will be happy to help you...but 'help' is where YOU do your share of the work, not just ask someone for a handout. If you want to 'study', what have you done/tried so far? What have you written?

There are THOUSANDS of very easily-found shell scripting tutorials you can find with a brief Google search...since you want to 'study', which one(s) have you looked up so far?

Help .... yes

Write it for you ... no

Blog entry on scripting

Also see Habitual's list of useful links, many of which are BASH scripting guides.

Start your own homework and if/when you get stuck, ask more well informed questions; you'll get some assistance that way.

Quote:

Originally Posted by sekhar.hai (Post 5193114)

a beginner of Linux admin

Bit contradictory, don't you think :)

You can use e.g useradd and read. Really very easy to do. Wouldn't take more than a minute or two.

Typed in 'shell script add user' at Google.com

Here is the first of millions of results.

Code:

#!/bin/bash

# Script to add a user to Linux system

if [ $(id -u) -eq 0 ]; then

        read -p "Enter username : " username

        read -s -p "Enter password : " password

        egrep "^$username" /etc/passwd >/dev/null

        if [ $? -eq 0 ]; then

                echo "$username exists!"

                exit 1

        else

                pass=$(perl -e 'print crypt($ARGV[0], "password")' $password)

                useradd -m -p $pass $username

                [ $? -eq 0 ] && echo "User has been added to system!" || echo "Failed to add a user!"

        fi

else

        echo "Only root may add a user to the system"

        exit 2

fi

Source http://www.cyberciti.biz/tips/howto-...-add-user.html