启动kde时出现 找不到配置文件，不能进入Xwindow，帮忙看看

5uu8

xrdb: Can't open display ''
xmodmap:  unable to open display ''
xhost:  unable to open display ""
用户“root”未找到配置文件
/usr/bin/xsetroot:  unable to open display ''
Error: Can't open display:
Warning: This program is an suid-root program or is being run by the root user.
The full text of the error or warning message cannot be safely formatted
in this environment. You may get a more descriptive message by running the
program as a non-root user or by removing the suid bit on the executable.
/usr/bin/xterm Xt error: Can't open display: %s
/usr/bin/xterm:  DISPLAY is not set
/usr/bin/twm:  unable to open display "