Re: Can adding users be disabled.

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Marti, Robert wrote:
The question needs to be asked - if you can't trust root, who can you trust?

Or, for that matter, you could just rm /usr/sbin/useradd... but root can manually create a user with no problem at all... lessee, edit /etc/passwd, create the home directory, set permissions, add to /etc/groups....

Why do you think you need to keep the root account from creating users?

	mark
Sent from my iPhone

On Feb 9, 2010, at 6:34, "TYURIN Aleksey" <Aleksey.TYURIN@xxxxxxxxxxxxx> wrote:

Yes, you can use simple methods: "rm /usr/sbin/useradd" or "chmod a- x /usr/sbin/useradd". But this only disable, but not deny. root-user can copy "useradd" binary file from another server and set execute bit.

SELinux can deny operation useradd even for the root-user.
Restart the server, in my opinion, is not required. But the need to restart several services and remounting of file systems.

Good luck!


AT

-----Original Message-----
From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list- bounces@xxxxxxxxxx] On Behalf Of Rohit khaladkar
Sent: Tuesday, February 09, 2010 2:48 PM
To: General Red Hat Linux discussion list
Subject: Re: Can adding users be disabled.

Thanks Dustin! This worked like a charm!

Tyurin, I cannot reboot the server right now , so was not able to try the selinux stuff. But I'll try that definitely.

Thanks!
Rohit Khaladkar.

On Tue, Feb 9, 2010 at 4:49 PM, Dustin Larmeir <dustin@xxxxxxxxxxx> wrote:

You can find the binary and chmod it to 000 and then use chattr -i,
That would stop it. - Dustin

-----Original Message-----
From: redhat-list-bounces@xxxxxxxxxx [mailto:
redhat-list-bounces@xxxxxxxxxx]
On Behalf Of Rohit khaladkar
Sent: Tuesday, February 09, 2010 4:11 AM
To: General Red Hat Linux discussion list
Subject: Can adding users be disabled.

Hi All,
Can we disable adding users command "useradd" even for the root user..?



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Thanks!
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