fsck
Unix-like operating system command
The system utility fsck is a tool for checking the consistency of a file system in Unix and Unix-like operating systems, such as Linux, macOS, and FreeBSD. The equivalent programs on MS-DOS and Microsoft Windows are CHKDSK, SFC, and SCANDISK. Wikipedia
Function: Check and repair filesystems
Syntax: fsck -lsAVRTMNP -r fd -C fd -t fstype filesystem... -- fs-specific-options