setup su password.

默认的su密码不知道，上网查了查 有些和我一样疑惑的人

当然了，也有好心人给出了解决的方法：

# passwd root Changing password for root New password: Verify password:

＊superuser (i.e. "root") account, which controls everything in Unix, is turned off by default in most Mac OS X installations. These instructions tell you how to enable the Unix "root" account on Mac OS X.

以上。