大家好，我在使用Debian过程中遇到些问题，GOOGLE又搜不到，所以来请教下大家，还望不吝赐教！先行谢过了！
问题1.
用root用户登陆后执行程序哪怕是VIM都会提示：
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
而执行xvidtune后提示：
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
Error: Can't open display: :0.0
问题2.
在用Virtualbox时网络选择NAT后提示：
A Domain Name Server (DNS) for NAT networking could not be determined. Please check your /etc/resolv.conf for nameserver entries. Either add one manually (man resolv.conf) or ensure that your host is correctly connected to an ISP. If you ignore this warning the guest will not be able to perform nameserver lookups and it will probably observe delays if trying so.
错误 ID: NoDNSforNAT
严重: 警告
查看了/etc/resolv.conf 里面只有一行注释，好像是说不要修改，菜菜的我看到这个提示也就没敢动了~！
问题3.
Virtualbox如何设置才能跟主机连通？我设置为internat 设置IP后ping 不通主机。。。。
希望知道的大大能帮忙解答下，先谢谢所有回贴的朋友！谢谢！
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