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SYNC(1) User Commands SYNC(1)

sync - Synchronize cached writes to persistent storage

sync [OPTION] [FILE]...

Synchronize cached writes to persistent storage

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

sync only file data, no unneeded metadata
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.

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Copyright © 2023 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

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

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

February 2024 GNU coreutils 9.4