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Introduction For any Linux system administrator or enthusiast, understanding different filesystems and their overheads could be crucial for performance tuning and system optimization. Filesystem overhead refers to the amount of disk space used by the filesystem to manage or organize files and directories, rather than storing the actual data. In this blog post, we'll delve into how you can use Linux Bash tools to compare the filesystem overhead across various types, including popular choices like EXT4, XFS, and Btrfs, and less common ones like JFS or ReiserFS. What is Filesystem Overhead? Filesystem overhead includes the storage consumed by metadata (information about files like permissions, ownership, timestamps, etc.