What is a Linux Filesystem?

All data in Linux is organized into files. All files are organized into directories and these directories are organized into a tree-like structure called the Linux file system. So, a filesystem is the logical representation of the physical entity. All operating system uses a filesystem-specific driver to read from and/or write to a partition.

The most widely used native filesystem types in Linux are XFS, ext4, ext3, ext2, global file system, NFS, CIFS, SMB and FS-Cache. ext4 is the default file system used in most Linux distributions.

How to Gather a Filesystem Information?

DF command – the df commands allows to displays the system’s disk space usage with various options  (-k, -g, -h,)

#df -h