Inode structure

• File size
• reference count
• permission
• etc

[!tip] Files don’t have metadata - They are just file name and inode member (pointer) - Directories are just table of file names and inodes

Inodes count is setup on the file system creation

except zfs ## Inodes creation If you’re talking about ext4 filesystems, it’s based on the size of the filesystem.

ArchWiki

Determine the amount of inodes on the system

df -iT | awk 'NR > 1 {print $3}' | awk '{sum +=$1} END {print sum}'

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• Hardlink
• Inodes exhaustion
• Journaled Filesystem