题目内容

某台linux虚拟机正常开机，在进行远程连接之前，首先要做的重要测试是？

A. 测试root用户是否能登陆虚拟机。
B. ping 虚拟机ip，测试网络是否联通。
C. 不用做测试，直接远程工具连接。
D. 以上说法都不对。

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