File Systems
A file system implementation or a concrete file system (to distinguish from a virtual file system) gives a way to access data from regions of a disk that are associated with an inode.
A file system is a layer of abstraction above the physical disk.
Examples include: ext4, NTFS, etc
1. Example commands
mkfs.ext4 /dev/sdbformatssdbso that it uses an EXT 4 file systemmkswapformats swap partition