John works as a Network Administrator for Perfect Solutions Inc. The company has a Linux-based network. Due to some network security reasons, John wants to shut down all network interfaces just before rebooting the Linux server. Which of the following commands will he use to accomplish the task?

John works as a Network Administrator for Perfect Solutions Inc. The company has a Linux-based network. Due to some network security reasons, John wants to shut down all network interfaces just before rebooting the Linux server. Which of the following commands will he use to accomplish the task?
A . init 3
B . init 6
C . init 0
D . shutdown -r now
E . reboot -i

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Answer: E