Answer:
The fstab (file systems table) file in Unix-like operating systems is used to define how file systems should be mounted and configured during the boot process.
When a block device is added to the fstab file, it allows the system to automatically mount the file system associated with that device during the boot process. This means that the file system will be available for use by the system and its users immediately after booting up, without the need for any manual intervention.
The fstab file contains information such as the device name, mount point, file system type, and mount options for each file system to be mounted. By adding a block device to the fstab file, the system can automatically mount the file system at the specified mount point with the specified options, without requiring the user to manually enter any commands.
Overall, adding a block device to the fstab file is a convenient way to ensure that a file system is automatically mounted during the boot process, which can save time and effort for system administrators and users.
Step-by-step explanation: