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Full Discussion: Cannot open xwindows/xterm as a root
Operating Systems AIX Cannot open xwindows/xterm as a root Post 302965449 by bakunin on Friday 29th of January 2016 06:37:54 AM
Old 01-29-2016
Quote:
Originally Posted by system.engineer
disabled the direct root login on all the AIX LPARs. So' only can become root by "su" to root from normal/regular user account.
This is a rather problematic setting. What are you going to do if something fails and you need to access the system via the console window from the HMC?

set "rlogin=false" but leave "login=true" for the root account! Everything else will get you into very deep kimchi once something fails. "rlogin=false login=true" means that root cannot log on from the network but can still log on from the console.

The reason why the root account has a different environment when you log in and when you sudo su - is most probably because sudo clears the environment before issuing su. The DISPLAY variable is set via the ssh because of the (implied or explicitly set) -X switch. You can write a little wrapper script to read that variable, store its value in a temp file and then retrieve it once you switched to root, setting it again to that value (similar to what agent.kgb suggested, but automated).

I hope this helps.

bakunin
 

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LEARN ABOUT PHP

login.krb5

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

NAME

       login.krb5 - kerberos enhanced login program

SYNOPSIS

       login.krb5 [-p] [-fFe username] [-r | -k | -K | -h hostname]

DESCRIPTION

       login.krb5  is a modification of the BSD login program which is used for two functions.	It is the sub-process used by krlogind and telnetd
       to initiate a user session and it is a replacement for the command-line login program which, when invoked with a  password,  acquires  Ker-
       beros tickets for the user.

       login.krb5  will  prompt  for a username, or take one on the command line, as login.krb5 username and will then prompt for a password. This
       password will be used to acquire Kerberos Version 5 tickets (if possible.) It will also attempt to run aklog to	get  AFS  tokens  for  the
       user.  The  version 5 tickets will be tested against a local krb5.keytab if it is available, in order to verify the tickets, before letting
       the user in. However, if the password matches the entry in /etc/passwd the user will be unconditionally	allowed  (permitting  use  of  the
       machine in case of network failure.)

OPTIONS

       -p     preserve the current environment

       -r hostname
	      pass hostname to rlogind.  Must be the last argument.

       -h hostname
	      pass hostname to telnetd, etc.  Must be the last argument.

       -f name
	      Perform pre-authenticated login, e.g., datakit, xterm, etc.; allows preauthenticated login as root.

       -F name
	      Perform pre-authenticated login, e.g., datakit, xterm, etc.; allows preauthenticated login as root.

       -e name
	      Perform pre-authenticated, encrypted login.  Must do term negotiation.

CONFIGURATION

       login.krb5  is  also  configured via krb5.conf using the login stanza. A collection of options dealing with initial authentication are pro-
       vided:

       krb5_get_tickets
	      Use password to get V5 tickets. Default value true.

       krb_run_aklog
	      Attempt to run aklog. Default value false.

       aklog_path
	      Where to find it [not yet implemented.] Default value $(prefix)/bin/aklog.

       accept_passwd
	      Don't accept plaintext passwords [not yet implemented]. Default value false.

DIAGNOSTICS

       All diagnostic messages are returned on the connection or tty associated with stderr.

SEE ALSO

       rlogind(8), rlogin(1), telnetd(8)

																	  LOGIN(8)
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