Linux+ V7 Disk Space and Inode Troubleshooting

1. A filesystem is 98% full. Which action is safest to free space immediately?

Compress old log files and archive them

Delete random user files

Remove system binaries

Clear the entire /tmp directory without checking

2. A filesystem shows 100% inode usage but df -h shows space available. How do you fix this?

Find and remove unnecessary small files or temporary files

Resize the filesystem partition

Rebuild the inode table with fsck

Replace the hard drive

3. The 'ncdu' tool provides which advantage over standard 'du' for disk analysis?

Interactive navigation and real-time directory size comparison

Faster execution speed on large filesystems

Ability to modify files directly

Integration with cloud storage

4. A service fails to write logs because the disk is full. Which step should you take first?

Identify and clear unnecessary files without deleting active logs

Immediately resize the partition

Reboot the system

Disable the service

5. What is the purpose of the 'reserved space' in ext4 filesystems (typically 5% for root)?

Allows root to continue system operations when filesystem is full

Stores filesystem metadata

Provides space for swap

Prevents user file creation

6. How do you safely remove old backup files to reclaim disk space?

Find /backups -mtime +30 -delete with caution

Rm -rf /backups/*

Dd if=/dev/zero of=/backups/file

Shred /backups/*

7. A partition shows negative available space in df output. What does this indicate?

Reserved space for root is being consumed by large files

Filesystem corruption requiring fsck

Hardware failure imminent

Partition table is invalid

8. Which command shows filesystem type and mount options?

Mount | grep

Df -T

Blkid

All of the above

9. What is a common cause of inode exhaustion on web servers?

Accumulation of thousands of temporary cache files

Excessive RAM usage

Network packet loss

CPU overclocking

10. How can you determine which user is consuming the most disk space in their home directory?

Du -sh /home/*

Quota -u

Df -h /home

Both a and b

11. Which command displays the percentage of disk space used on mounted filesystems?

Df -h

Du -s

Fdisk -l

Lsblk -f

12. What does 'du' stand for in the context of disk analysis?

Disk Utility

Disk Usage

Data Utilization

Directory Update

13. How do you find files modified in the last 24 hours to locate recent disk-filling culprits?

Find / -mtime -1

Find / -mtime +1

Ls -t | head

Stat -c %y *

14. A log file fills the root filesystem. Which directory typically contains application logs?

/var/log

/tmp/logs

/home/logs

/opt/logs

15. Which tool identifies the largest files on a filesystem to help reclaim space?

Du -sh * | sort -hr

Ls -lS

Find / -size +100M

All of the above

16. What happens when a filesystem runs out of inodes?

New files cannot be created even if disk space remains

The system automatically expands the inode table

Existing files are deleted to free inodes

Only root user can create new files

17. Which command recursively shows disk usage for each subdirectory?

Du -h --max-depth=1

Df -R

Ls -lR

Find -size +0

18. A filesystem reports 95% inode usage but only 30% disk space used. What is the primary issue?

Too many small files consuming all available inodes

Disk controller failure

Corrupted partition table

Insufficient physical RAM

19. How do you check the inode usage of a filesystem?

Df -i

Du -i

Stat -i

Inode -l

20. What does an inode store on a Linux filesystem?

File content and data blocks

File metadata: permissions, timestamps, size, and pointers to data blocks

Directory names and file locations

Disk partition information and boot sector

Linux+ V7 Diagnosing Disk Space and Inode Issues Quiz