Fsck may refer to any of the following:
1. Short for file system check, fsck is a program run on Linux, Unix, and their variants that checks the file system for any errors. For users who are familiar with Microsoft Windows, this command is similar to Microsoft's ScanDisk command. Fsck functions in two modes: interactive and non-interactive. Interactive mode prompts the user each time it finds an error to determine whether or not the user wants to fix the error or continue without fixing. Non-interactive mode automatically corrects errors without prompting the user.
2. Fsck is a common misspelling for the swearword f***.