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
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.
© 2020 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.
or available locally via: info '(coreutils) sync invocation'