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Top Forums UNIX for Beginners Questions & Answers Login cancellation question Post 302967160 by vbe on Saturday 20th of February 2016 04:43:52 AM

02-20-2016

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Most UNIX have root not locked unless using RBAC perhaps but accessible to only very limited devices where ordinary people have no access...
Thats is why servers are in white? rooms where security is high and only the sysadms have access...

To answer

Quote:

would the system and its contents be inaccessible?? This is pure curiosity.

The only system I found with root disabled was a lab machine configured with another sysadm of my team, we were trying all figures to go further in security... and so using RBAC we disabled root account... Fine till we forgot the passwords... And realised we were doomed, though my friend and collegue is highly specialized in solaris ( as I had no small HPUX to use at the time ) this was a sparc/solaris 10, we just could not find a way to get back at the system, OK we may did more than just RBAC as we were trying to highly secure... So on one hand we achieved what we wanted, on the other we saw the silly situation we were in for not remembering the passwords...
Morality?
I am sure all serious sysadm configures his boxes with a backdoor only it may not be at a user level, and the minimum security to my eyes is to not let direct connection from the net unless dedicated lan to root even via ssh, using su/sudo only and having root only accessible from console which should be a real dedicated console (/dev/console...) on serial port or dedicated lan for lan consoles

vbe

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userdel

USERDEL(8)						      System Manager's Manual							USERDEL(8)

NAME

       userdel - Delete a user account and related files

SYNOPSIS

       userdel [-r] login

DESCRIPTION

       The  userdel  command modifies the system account files, deleting all entries that refer to login.  The named user must exist.  The options
       which apply to the userdel command are:

       -r     Files in the user's home directory will be removed along with the home directory itself and the user's mail spool.  Files located in
	      other file systems will have to be searched for and deleted manually.

FILES

       /etc/passwd - user account information
       /etc/shadow - secure user account information
       /etc/group - group information

CAVEATS

       userdel will not allow you to remove an account if the user is currently logged in.  You must kill any running processes which belong to an
       account that you are deleting.  You may not remove any NIS attributes on an NIS client.	This must be performed on the NIS server.

SEE ALSO

       chfn(1), chsh(1), passwd(1), groupadd(8), groupdel(8), groupmod(8), useradd(8), usermod(8)

AUTHOR

       Julianne Frances Haugh (jockgrrl@ix.netcom.com)

																	USERDEL(8)