Which of the following commands should the Linux administrator run to confirm that the device has been recognized?

A Linux administrator has physically added a new RAID adapter to a system.

Which of the following commands should the Linux administrator run to confirm that the device has been recognized? (Select TWO).
A . rmmod
B . Is -11 /etc
C . Ishw ―class disk
D . pvdisplay
E . rmdir /dev
F . dmesg

View Answer

Answer: C F

Explanation:

The following commands can help you confirm that the new RAID adapter has been recognized by the Linux system:

dmesg: This command displays the kernel messages, which can show the information about the newly detected hardware device. You can use dmesg | grep -i raid to filter the output for RAID-related messages.

lshw -class disk: This command lists the disk devices on the system, including the RAID controller and its model name. You can use lshw -class disk | grep -i raid to filter the output for RAID-related information1.

The other commands are not relevant for this purpose. For example:

rmmod: This command removes a module from the Linux kernel, which is not useful for detecting a new device.

ls -l /etc: This command lists the files and directories in the /etc directory, which is not related to hardware devices.

pvdisplay: This command displays the attributes of physical volumes, which are part of the logical volume management (LVM) system, not the RAID system.

rmdir /dev: This command removes an empty directory, which is not helpful for detecting a new device.

Moreover, /dev is a special directory that contains device files, and should not be removed.