I've had him on my CES Supersession panel on Big Thinkers-Disruptive Technologies for the last couple of years, and his perspective is always fascinating.
2
这样是安全的——就像它的名字“单一用户模式”的含意一样——只有超级用户可以访问系统。
It is safe, since — as the name "single-user mode" suggests — only the superuser is able to access the system.
3
执行这个修改很可能需要超级用户访问权。
You will likely need superuser access to make such a change.