sync — Synchronize cached writes to persistent storage

Examples (TL;DR)


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 any translation bugs to <>

See Also

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

Full documentation <>
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).

October 2019 GNU coreutils 8.31