John works as a Network Administrator for Perfect Solutions Inc. The company has a Linux-based
network. John is working as a root user on the Linux operating system. He wants to check the
errors of an ext2 filesystem. Which of the following commands can John use to accomplish the
task? Each correct answer represents a complete solution. Choose all that apply.

A.
e2fsck

B.
fsck

C.
fsck -N

D.
fsck.ext2