[oracle@cfylinux database]$ ./runInstaller
Starting Oracle Universal Installer...
Checking Temp space: must be greater than 80 MB. Actual 8031 MB Passed
Checking swap space: must be greater than 150 MB. Actual 2047 MB Passed
Checking monitor: must be configured to display at least 256 colors
>>>
Could not execute auto check for display colors using command
/usr/X11R6/bin/xdpyinfo. Check if the DISPLAY variable is set. Failed
<<<<
Some requirement checks failed. You must fulfill these requirements before
continuing with the installation,at which time they will be rechecked.
Continue? (y/n) [n]
在安裝時發生了以上問題，經過上網查找發現瞭解決辦法：
正確的登錄方式：在字符界面，使用 oracle 用戶通過 start x登錄 Xwindow，即可進行安裝。或者以圖形界面啓動系統，再使用 oracle 用戶登陸，即可進行安裝。
失敗的登陸方式：以root用戶登錄Xwindow，然後su - oralce，這樣在進行安裝時，就會提示上述那些錯誤了。