Linux supports many filesystems, and picking the right one for a given use case genuinely matters — they differ meaningfully in features, performance characteristics, and maturity.
ext4: The Reliable Default
Mature, extremely well-tested, and the default on most distros for good reason — solid general-purpose performance with no exotic features, and an enormous track record in production.
XFS: Built for Large Files and Parallelism
Excels at large files and high-concurrency workloads (common on RHEL/CentOS as the default) — genuinely strong for database and media server workloads specifically, less commonly the first choice for a general desktop.
Btrfs: Modern Features, Mixed Maturity
# Btrfs supports snapshots, built-in compression, and checksums natively sudo mkfs.btrfs /dev/sdb1 sudo btrfs subvolume snapshot /mnt/data /mnt/data-snapshot-2025
Copy-on-write snapshots and built-in checksumming are genuinely valuable, but Btrfs’s RAID 5/6 modes have had well-documented historical stability issues that keep some administrators cautious about relying on them for production RAID.
ZFS: The Feature-Complete Option
Combines a volume manager and filesystem with checksumming, snapshots, and self-healing RAID — genuinely the most feature-complete option, but requires separate installation on most distros due to licensing incompatibility (CDDL) that prevents it from shipping directly in the Linux kernel.