Red Hat

Hi,
I find there is some customized linux with application.
When I use login account root and type the password.
It is not allow to login.
But if I login with specified user and password.
Then I use command "su - " and type root passwd.
It allow you to switch to "root" account .
Or if i use "su - root" and type password .it is not allow to login again .
It is strange I cannot login if I specified to use "root" account .

How to make this setting ..
Please advice in detailed.

I have faced similar type of problem .
for me , /etc/passwd file was changed like this

Code:

root:x:0:0:root:/root:/bin/false

login shell was changed to /bin/false .

Hi,
I try to change /etc/passw to false at root entry.
I follow your setting.
But I find I cannot login in console with root.
Even I login with other non-root account.
I cannot use "su -" to switch to root again.

it is not my case . my case is .. I can use "su -" to switch to root again.

Please advice ...

Because of /bin/false , it was problem .After changing /bin/false to /bin/bash it was ok for me .
log in with other user and what is the log in shell in /etc/passwd file .

I have given another user a root privilege , so I was able to change file .

I find use below

Code:

echo > /etc/securetty

then the login root in console will be not allow .

But I login with other non-root account and use "su - root " .
I is still working ...
I need to make "su - root" not working from other non-root account .
But "su - " is needed to work.

Please advice any method .....

The root user is no regular user.
And for security issues, its not supposed (on any 'real' *nix system != *ubuntu (did suse remove that option yet?)) to login to GUI.

You might have better luck, to remove the users from admin group (adm) so they wont have permission to login root.

Further a closer inspection of /etc/passwd as already suggested seems a good idea.
You dont need to limit root, leave root's values alone, you need to limit the user!

I want to reproduce in normal linux OS.
please advice how I can make this .....