I'm trying to install Oracle 11g on RHEL5. But after I add user oracle, it cannot log in XWindow. I can log in as root. I tried "xhost +" or "xhost +si:localuser:oracle", but it seems like: [root@ern pam.d]# xhost + access control disabled, clients can connect from any host [root@ern pam.d]# xhost access control disabled, clients can connect from any host INET:ern SI:localuser:root [root@ern pam.d]# su - oracle [oracle@ern ~]$ xclock Error: Can't open display: localhost:0.0 [oracle@ern ~]$ And after restarting the machine, it didn't work either. I stopped SELinux through GUI tools. Can anyone help me out? Thanks in advance. -- Yao Yongping Learning Oracle, UNIX/Linux... Love Reading, Classical Music, Philosophy, Economics etc. Blog: http://spaces.msn.com/yaoyp/