sync man page

sync — Synchronize cached writes to persistent storage



sync path/to/file


sync [OPTION] [FILE]...


Synchronize cached writes to persistent storage

If one or more files are specified, sync only them, or their containing file systems.

-d, --data

sync only file data, no unneeded metadata

-f, --file-system

sync the file systems that contain the files


display this help and exit


output version information and exit


Persistence guarantees vary per system. See the system calls below for more details.


Written by Jim Meyering and Giuseppe Scrivano.

Reporting Bugs

GNU coreutils online help: <>
Report sync translation bugs to <>

See Also

fdatasync(2), fsync(2), sync(2), syncfs(2)

Full documentation at: <>
or available locally via: info '(coreutils) sync invocation'

Referenced By

bdflush(2), btrfs-filesystem(8), ecryptfs-rewrite-file(1), fsync(2), guestfs-testing(1), proc(5), quotactl(2), sync(2).

July 2018 GNU coreutils 8.30 User Commands