[oracle@localhost database]$ ./runInstaller
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Starting Oracle Universal Installer...
Checking Temp space: must be greater than 120 MB. Actual 38232 MB Passed
Checking swap space: must be greater than 150 MB. Actual 3999 MB Passed
Checking monitor: must be configured to display at least 256colors
>>> Could notexecute auto check for display colors using command /usr/bin/xdpyinfo. Check ifthe DISPLAY variable is set. Failed<<<<
Some requirement checks failed. You must fulfill theserequirements before
continuing with the installation,
Continue? (y/n) [n]
解决方法：
[root@localhost Packages]# xhost +
xhost: unable to open display "192.168.56.144:0.0"
[root@localhost Packages]# export DISPLAY=:0.0
[root@localhost Packages]# xhost +
access control disabled, clients can connect from any host
[root@localhost Packages]# xclock
出现小钟就ok了。