Useradd on 200 servers from one server. Post: 302899638

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Top Forums Shell Programming and Scripting Useradd on 200 servers from one server. Post 302899638 by rbatte1 on Wednesday 30th of April 2014 12:03:14 PM

04-30-2014

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If you put the public SSH key on each of the servers, then you will be able to have password-less authentication to run the commands. Do you know how to generate the keys and what to do with them?

If you are running as the root user, then you will need to make sure that the /etc/ssh/sshd.conf configuration file permits root login. There are a number of options to consider and balance against the risks.

I'm afraid that there is no easy way to get them onto each server - it will be a manual task, but the investment of time in a one off action.

Note
When you are adding your users, you will need to make sure that their UID is unique too. Some servers will object if you try to add a user with a specific UID that already exists. You could get away with not specifying the UID, but then if you are NFS sharing files (or moving them keeping original permissions) then you will all sorts of problems because files are owned by the UID not the alphabetic userid.

I agree with jlliagre that you would be better to use NIS (historically also known as YP) or LDAP. Once set up, that would cut down the administration effort.

Robin

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LEARN ABOUT DEBIAN

pam_rootok

PAM_ROOTOK(8)							 Linux-PAM Manual						     PAM_ROOTOK(8)

NAME

       pam_rootok - Gain only root access

SYNOPSIS

       pam_rootok.so [debug]

DESCRIPTION

       pam_rootok is a PAM module that authenticates the user if their UID is 0. Applications that are created setuid-root generally retain the
       UID of the user but run with the authority of an enhanced effective-UID. It is the real UID that is checked.

OPTIONS

       debug
	   Print debug information.

MODULE TYPES PROVIDED

       The auth, acct and password module types are provided.

RETURN VALUES

       PAM_SUCCESS
	   The UID is 0.

       PAM_AUTH_ERR
	   The UID is not 0.

EXAMPLES

       In the case of the su(1) application the historical usage is to permit the superuser to adopt the identity of a lesser user without the use
       of a password. To obtain this behavior with PAM the following pair of lines are needed for the corresponding entry in the /etc/pam.d/su
       configuration file:

	   # su authentication. Root is granted access by default.
	   auth  sufficient   pam_rootok.so
	   auth  required     pam_unix.so

SEE ALSO

       su(1), pam.conf(5), pam.d(5), pam(7)

AUTHOR

       pam_rootok was written by Andrew G. Morgan, <morgan@kernel.org>.

Linux-PAM Manual						    06/04/2011							     PAM_ROOTOK(8)