Fsck

fsck
	fsck in action on a Linux system.
Operating system	Unix and Unix-like
Type	Command

The system utility fsck (file system check) is a tool for checking the consistency of a file system in Unix and Unix-like operating systems, such as Linux, macOS, and FreeBSD.^[1] The equivalent programs on MS-DOS and Microsoft Windows are CHKDSK, SFC, and SCANDISK.

^ fsck(8) – Linux Programmer's Manual – Administration and Privileged Commands "In actuality, fsck is simply a front-end for the various filesystem checkers (fsck.fstype) available under Linux."