how to add user to unix

Anon

i need document on how to add user to unix
(i use php3 and slackware7)

Anon

If you need to add a user to linux...at the prompt, just type adduser? Then just add in what you want when prompted.

Anon

I would think that slackware and redhat are close and in redhat the command that I use is:

useradd <user>

You will then need to set the password for the user by doing:

passwd <user>

Linux will then prompt you for the password of the user.

Of course you must be root or have root priv's to do this add or delete users....

Just so you know to delete a user:

userdel <user>

Anon

I don't need add user to linux with prompt commnad but
i need add user to linux with PHP on internet browser

Anon

why do you answer to this question with this adduser stuff, while its obvious, that newman wants a web based script (php3) that adds a user?

you make a form, and just submit it to the php script.

or maybe I misunderstand something too 🙂

Regards,

Anon

Ooops, Sorry guess I was a sleep at the wheel last night....

DocL.

Anon

thank tibyke
yes i make form and submit data to php script but i don't know php script for adduser to linux system
help me! please

Anon

You should likely create a cron job that runs as root every so often and grabs a file, if it exists and hands it off to something like newusers under RedHat.

man newusers

should get ya started.

Anon

Well all my friends, it seems you've got the same problems like me 🙂
But you can breath up, here is a solution:

use chpasswd

only unpretty thing is, you have first to write your password in a file. Delete it after the new password(s) are set.

if someone knows how to create the encrypted password string inside the shadow file you can change it by writing in the shadow file. Ok, ok I know this is VEERY ugly.

There is one solution more: use the expect command. But I warn you it's not easy to understand ...

so long my friends..

Anon

The cron file seems kind of kludgy to me.

You can have your PHP script update users, but it is very risky.

Below is a quick script I used to test it out:

<?

$userid="testuser";
$passwd="123booga";

$create="/usr/sbin/useradd -d/clients/$userid -p".crypt($passwd)." $userid";
echo "$create<HR>";
exec($create);
?>

Now, why is this dangerous? Because to create passwords, you have to have root access. You can tell your web server (Apache w/PHP module is what I'm using) to run as root, but you have to recompile it, as well as possibly open up your security.

Anon

Seems strange to reply to my own message...

I'm using RedHat 6.2 with Apache 3.1.12 & PHP3 (to give you the background).

I ended up downloading super 3.12.1 - 1 from the contrib libraries. It's similar to sudo, but allows you to specify which commands are available and at which level you run them. Since we only needed to have useradd run as root, it makes it easy to configure for me. It also doesn't need password authorization, which makes it perfect for our purpose.

I then created a user & group to run my web server as (web) as opposed to the standard "nobody" user & group. Next, I created the /etc/super.tab file (which gives super it's rights) and put the following information in it:

useradd /usr/sbin/useradd web \
u+g=root

This allows user "web" to run useradd as root.

Then, I changed my php script so it runs super rather than useradd:

<?

$userid="testuser";

$passwd="123booga";

$create="super useradd -d/clients/$userid -p".crypt($passwd)." $userid";
echo "$create<HR>";

exec($create);

?>

<HR>

And it works!

I hope this helps you out.

Anon

Sorry 'bout this. Forgot to change the subject.

I'm using RedHat 6.2 with Apache 3.1.12 & PHP3 (to give you the background).

useradd /usr/sbin/useradd web \
u+g=root

This allows user "web" to run useradd as root.

Then, I changed my php script so it runs super rather than useradd:

<?
$userid="testuser";
$passwd="123booga";

$create="super useradd -d/clients/$userid -p".crypt($passwd)." $userid";
echo "$create<HR>";
exec($create);
?>
<HR>

And it works!

I hope this helps you out.

Anon

I have the same problem as this, but I'm using Lynx OS. It seems that in Lynx OS, the command is 'adduser', but there is no man page for it.

I need to do this all in one line. I can execute a command in one line to Lynx, but, by the time I want to execute the next line, Lynx thinks I'm on a different command (because I'm opening and closing a session with each command--not my code, so I can't change it). If you don't understand the above then just trust me in that I can only execute one-line commands.

Does anyone know how to use adduser on Lynx in only one line or know how to add a user to Lynx thru PHP?

Anon

i have more complex problem!!!
how to get the password if user forgot his password in unix system.

Anon

I wouldn't even attempt to decode a password. I'd just go through and reset the password for the user, then let them change it.