fsck (File System Consistency Check)

fsck, or File System Consistency Check, is a utility used to examine and repair the structure of a storage device, such as a hard drive or SSD. When a computer shuts down unexpectedly or experiences errors, the file system—where data is organized—may become inconsistent or corrupted. fsck scans the drive to identify and fix these problems, ensuring data integrity and preventing potential data loss or system crashes. It’s a vital tool for maintaining the health and reliability of storage devices, especially after unexpected shutdowns or errors.