fsck
Sign in to saveAlso known as Filesystem check
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. The equivalent programs on MS-DOS and Microsoft Windows are CHKDSK, SFC, and SCANDISK.
Key facts
- Software.name
- fsck
- Software.screenshot
- Fsck output.jpg
- Software.screenshot size
- 250px
- Software.caption
- fsck in action on a Linux system.
- Software.operating system
- Unix and Unix-like
- Software.genre
- Command
via Wikipedia infobox
~5 min read
Article
8 sectionsContents
- Use
- Boot time
- History
- As a minced oath
- Examples
- See also
- References
- External links
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. The equivalent programs on MS-DOS and Microsoft Windows are CHKDSK, SFC, and SCANDISK.
==Use== Generally, fsck is run either automatically at boot time, or manually by the system administrator. The command works directly on data structures stored on disk, which are internal and specific to the particular file system in use - so an fsck command tailored to the file system is generally required. The exact behaviors of various fsck implementations vary, but they typically follow a common order of internal operations and provide a common command-line interface to the user. On modern systems, fsck simply detects the type of filesystem and calls the specialized (Linux) or (BSD, macOS) program for each type.