Questions to Determine

• What does df -i show for inode usage on each filesystem?
• Which directories contain the most files?
• What process or cron job is creating all these files?
• Are the files still needed or can they be safely removed?
• How many inodes does the filesystem have and can that be changed?
• What filesystem type is in use (ext4, xfs)?
• Is there a cleanup mechanism that should have been removing old files?
• Can the issue be prevented from recurring?