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Users report that they cannot access some files located in the /opt/finapp directory after a power outage caused an unexpected server restart. A Linux administrator examines the following filesystem details and system logs: # mount | grep finapp /dev/mapper/rhel-opt_finapp on /opt/finapp type xfs (rw,relatime,seclabel,attr2,inode64,logbufs=8, logbsize=32k,noquota) # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 931.5G 0 disk ##sda1 8:1 0 1G 0 part /boot ##sda2 8:2 0 930.5G 0 part ##rhel-root 253:0 0 30.5G 0 lvm / ##rhel-opt_finapp 253:1 0 900G 0 lvm /opt/finapp # grep opt_finapp /var/log/messages XFS (opt_finapp): Corruption detected in inode 3645, extent tree Which of the following commands should the administrator run in an attempt to fix the filesystem?
Correct Answer: B
For repairing XFS filesystems, the appropriate command is xfs_repair. Since the /opt/finapp directory resides on an XFS filesystem (indicated in the mount output), xfs_repair is suitable for diagnosing and fixing corruption in XFS inodes and extent trees. Using fdisk or fsck.ext4 is not appropriate for XFS filesystems, as these commands are intended for partitioning and ext4 filesystems, respectively. Reference: CompTIA Linux+ Study Guide.