Comments on: Linux Shell script to add a user with a password to the system

By: please help me

please help me — Thu, 03 Nov 2011 20:29:39 +0000

The student should write a bash program named myuseradd that accepts a list of users as argument

Script syntax: myuseradd [ [ ..]]

At least one argument must be provided and must not exceed 10 alphanumeric characters.

The script must not use the usedadd or similar commands. It must:

1- Check if user is root. If not the script cannot be run and it exits.
2- Check the number of arguments. If none the script exits.
3- Check if is already used, if yes the script exits.
4- Ask the user to provide the following data:
a. Home directory:
Default is /home/
The script accepts either /home/ or /. must
not exceed 10 alphanumeric characters and the entered home directory
must not exist already.
b. Login shell
Default is /bin/bash
The script can accept one of the shells as listed in /etc/shells.

If provided data does not meet conditions, the user is asked to enter the data again

5- Add user with name , provided home directory and login shell to the system’s users (/etc/passwd file).

6- Assign userid (must be the first available userid greater or equal to 500).

7- Create a new group with group name and gid same as uid and assign it as primary group. This must be done by adding an entry to /etc/group.If the group already exists, no change is done.

8- Create home directory and set required permissions.
9- Copy startup scripts to the home directory (from /etc/skel).

10- Create a line in /etc/shadow that corresponds to the user with a blank password.

11- Call the passwd program to set the password.

12- Produce an output the summarize what it did.

By: franka

franka — Mon, 03 Oct 2011 06:42:57 +0000

we really appreciate your useful code

By: jyothi

jyothi — Thu, 18 Aug 2011 05:07:06 +0000

pass=$(perl -e ‘print crypt($ARGV[0], “password”)’ $password)
in this block what does $ARGV[0] stores and how it will work

By: John

John — Sat, 23 Apr 2011 05:13:05 +0000

i just want to know the script
Write a shell script that can be used to:
Detailed requirements
1. The script can only be executed by the root user, administrator or users with administrative rights.
2. If the root user starts the program as specified, it should read the input file and check the new users’ information one by one. If a new user’s information is valid, it should create the account for the user and write the account information to a report file. The report file should have the following format:
account_name;user_id;group_name;group_id;created_date;user_fullname
3. If a new user’s information is not valid, it should not create the account for the user. The error should be written to an error report file. You need to specify the file format.
4. If the root user executes the script incorrectly, e.g., without the necessary parameters or with incorrect parameters, it should provide an appropriate help message to the user. For example, it could show the correct usage of the command.
5. If the root user executes the command with the –h switch, the program should give detailed information about the program and the file structure of the input file.
6. The input file should have the following structure:
• Each line is a user record.
• Each record has four fields separated by commas (,) as follows:
Username,password,groupname,fullname
Note: The password field must be between 9 and 12 characters long. The field for the user’s full name may contain blank spaces. You must specify the features of the other fields. If a group does not exist, the program should create a default group automatically.

By: naushad

naushad — Thu, 10 Feb 2011 09:29:27 +0000

OR
As a root
vim usershow
1 #!/bin/bash
2 #this script displays the users in machine.
3 egrep -v ^xyz /etc/passwd | cut -d”:” -f1 |less
esc:wq
cp usershow /usr/local/sbin/
chmod -R +x /usr/local/sbin
Thats it…Enjoymaadi
usershow

By: naushad

naushad — Thu, 10 Feb 2011 09:15:54 +0000

egrep -v ^xyz /etc/passwd | cut -d”:” -f1

Add this line in a script which displays all the users in your machine
i have used ^xyz , Starting with that. genarally user names will never start with that , so we get the desired result as output becouse of the option -v .

By: hemanth

hemanth — Fri, 07 Jan 2011 11:26:34 +0000

hi guys
can any one tell me how to write a script such that the script reads the password and enters to tat user

By: Anil

Anil — Thu, 23 Dec 2010 13:14:23 +0000

Very good script.

By: soumyav

soumyav — Thu, 26 Aug 2010 15:58:29 +0000

Hey I need a scrip to add 100 users to UNIX server using an Input file which has two input one full name the other username . But i need to generate password in the script which gets incremented with each added user ….

Thanks a lot in advance ….

soumya

By: Servando

Servando — Wed, 18 Aug 2010 18:25:51 +0000

It was very useful your sample,

thanks

Servando

By: majo053

majo053 — Sat, 06 Feb 2010 23:23:29 +0000

simple: echo PASSWORD | passwd USER –stdin

By: Harold Osborn

Harold Osborn — Fri, 15 Jan 2010 04:30:50 +0000

i need to help me. i want to good 100% user email, password and forget password.
frisrt sign user email then get get password number in then open in base.
if forget password then send email get password
Can anyone help me thank harold

By: Ravi Sajjan

Ravi Sajjan — Fri, 23 Oct 2009 08:25:55 +0000

Hello Everyone,
My self Ravi and I am trying to make one PHP page, from which i can able to create
new user in linux. where in php code will show three boxes
1.) New User Name:
2.) Password:
3.) Botton: Add now
with this php code i want to add new user in linux through web interface.

Kindly please help me out to do that so.

Regadrs,
Ravi

By: Dnyan

Dnyan — Mon, 17 Aug 2009 16:50:41 +0000

Hi all,

Can someone let me know, How to write script for password expiry notification in solaries.

By: Charanjit Singh

Charanjit Singh — Sun, 05 Jul 2009 08:59:07 +0000

Hi Vivek(nixcraft)
Your mentioned shell script giving me an error message while executing it
“line 19: syntex error: unexpected end of the file”
Please check and where it is get stuck..
Thanks
Charanjit Singh

By: Gordon

Gordon — Tue, 02 Jun 2009 22:29:34 +0000

Sample shell script to add a user

How do I change this to add the users full name ans login shell

By: Mukundan

Mukundan — Thu, 28 May 2009 15:01:17 +0000

I like to add bulk of user using bash scripting taking the user name from a text file from a given location and also want to set a sample passwd for the all user who have been created. and also the script has to mail to the corresponding user regarding the username and passwd . Can anyone help me out

Thanks in advance

By: palani

palani — Wed, 25 Mar 2009 07:23:20 +0000

hi
how to create new user to assign perssion to particular shell and set userid and groupid make this one line command

By: rapsa

rapsa — Mon, 16 Mar 2009 14:32:33 +0000

how about this one liner script

# useradd -m -p `perl -e ‘print crypt(“your_password”, “salt”),”\n”‘` your_username

By: laknath

laknath — Sat, 21 Feb 2009 19:41:57 +0000

hi,
i compile this program but when i move to the second part I cant execute it in root . I got a error???

No such file or directory

why is that ???
pls reply me….