sojha@sojha-w7dt ~
$ xclock
Error: Can't open display:

sojha@sojha-w7dt ~
$ startxwin
startxwin:  Resource temporarily unavailable (errno 11):  Another X server insta
nce is running on DISPLAY :0

sojha@sojha-w7dt ~
$ export DISPLAY=:0

sojha@sojha-w7dt ~
$ xclock

sojha@sojha-w7dt ~
$ xhost +
access control disabled, clients can connect from any host

sojha@sojha-w7dt ~
$ ssh oracle@va-txdb01
The authenticity of host 'va-txdb01 (10.0.60.32)' can't be established.
RSA key fingerprint is cf:bb:b3:91:ea:38:8c:5c:d4:a5:e3:0c:a6:35:8e:33.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'va-txdb01,10.0.60.32' (RSA) to the list of known hos
ts.

********************** W * A * R * N * I * N * G ****************va-txdb01*
* Individuals using this Arbinet-TheXchange system are subject to having  *
* all their activities on this system monitored, interecpted, recorded,   *
* recorded, read, copied, or captured in any manner and disclosed in any  *
* manner by system personnel.                                             *
*                                                                         *
* USE OF THIS SYSTEM BY ANY USER, AUTHORIZED OR UNAUTHORIZED,             *
* CONSTITUTES CONSENT TO SUCH MONITORING, INTERCEPTION, RECORDING,        *
* READING, COPYING OR CAPTURING and DISCLOSURE.                           *
*                                                                         *
* This Arbinet-TheXchange system and all related equipment are to be used *
* for the communication, transmission, processing, and storage of         *
* information relating to the official business of Arbinet-TheXchange.    *
* Unauthorized access or use of this Arbinet-TheXchange system is         *
* prohibited by U.S. laws including 18 U.S.C. 1030 (The Computer Fraud    *
* and Abuse Act of 1986).  If the monitoring, intercepting, recording,    *
* reading, copying or capturing reveals any possible voilation of         *
* criminal statutes, Arbinet-TheXchange will provide to law enforcement   *
* officials all relevant information including the data gathered.         *
* Violators will be prosecuted to the maximum extent allowed by the law.  *
***************************************************************************

oracle@va-txdb01's password:
Last unsuccessful login: Tue May 31 02:13:23 2011 on ssh from 10.0.55.104
Last login: Tue Jun  7 15:05:45 2011 on ssh from va-ibill01.thexchange.com

*******************************************************************************
*                                                                             *
*                                                                             *
*  Welcome to AIX Version 5.3!                                                *
*                                                                             *
*                                                                             *
*  Please see the README file in /usr/lpp/bos for information pertinent to    *
*  this release of the AIX Operating System.                                  *
*                                                                             *
*                                                                             *
*******************************************************************************

Database instances:
RAT1
TDB1

va-txdb01:RAT1:/u01/ARBPRDDB/home/oracle> dbca
DISPLAY not set.
Set DISPLAY environment variable, then re-run.

va-txdb01:RAT1:/u01/ARBPRDDB/home/oracle> export DISPLAY=10.0.20.122:0.0

va-txdb01:RAT1:/u01/ARBPRDDB/home/oracle> dbca

va-txdb01:RAT1:/u01/ARBPRDDB/home/oracle>