whatis filesystem
Filesystem
Also known as: file system
The on-disk format that organizes data into files and directories, such as ext4, XFS, Btrfs, or ZFS.
What Is a Filesystem in Linux?
A filesystem decides how names, metadata, and data blocks are laid out on a partition, and what features you get: journaling, snapshots, compression, checksums, or quotas. You create one with mkfs and attach it to the directory tree by mounting it.
ext4 is the conservative default, XFS scales well for large files, and Btrfs and ZFS add copy-on-write snapshots and checksums. "Filesystem" is also used loosely for the overall directory tree.
Example
lsblk -fLearn more about Filesystem
- Linux Filesystem Basics: What Every Directory Is For Linux organizes all files under a single root directory, with each subdirectory serving a specific purpose defined by the Filesystem Hierarchy Standard. This guide explains what lives in /, /home, /etc, /var, /usr, /opt, and /tmp -- and why.
- ext4 vs Btrfs vs XFS Explained Choosing a Linux filesystem matters more than most default-accepting installs suggest. This guide compares ext4, Btrfs, and XFS on stability, snapshots, scalability, and which one fits which use case.
- Btrfs vs ZFS: Choosing a Copy-on-Write Filesystem Both do snapshots, checksums, and compression. The differences that decide it are licensing, memory behaviour, how each handles RAID, and which failure modes you can live with.