Short for file systems table, fstab is a system configuration file found most commonly on Unix systems. The file contains information about available hard disks and disk partitions as well as instructions on how they are to be initialized and integrated into the file system.
The fstab file is usually used for basic configuration settings relating to the primary hard disk and startup file system. Settings for other and partitions are now handled by automatic mounting. The system administrator is responsible for creating and maintaining this file.