Force changed blocks to disk, update the super block.
--help display this help and exit
output version information and exit
Written by Jim Meyering.
Report sync bugs to firstname.lastname@example.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report sync translation bugs to <http://translationproject.org/team/>
Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
The full documentation for sync is maintained as a Texinfo manual. If
the info and sync programs are properly installed at your site, the
info coreutils 'sync invocation'
should give you access to the complete manual.
GNU coreutils 8.21 March 2016 SYNC(1)
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