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.\" SPDX-License-Identifier: 0BSD
.\"
.TH "SYNC" "1" "June 7, 2021" "voreutils 8252842" "General Commands Manual"
.nh
.if n .ad l
.SH "NAME"
\fBsync\fR
\- flush kernel caches
.SH "SYNOPSIS"
.HP 5n
\fBsync\fR
[\fB\-d\fR|\fB\-f\fR]
[\fIfile\fR]\[u2026]
.SH "DESCRIPTION"
Instruct the kernel to commit cached writes to
\fIfile\fRs
to their backing storage.
If none specified, flush all caches.
.SH "OPTIONS"
.TP 19n
\fB\-d\fR, \fB\--data\fR
Don't flush metadata.
.PD 0
.TP 19n
\fB\-f\fR, \fB\--file-system\fR
Flush entire filesystem containing each
\fIfile\fR.
This is a Linux extension, and will fail elsewhere.
.PD
.SH "SEE ALSO"
fdatasync(2),
fsync(2),
sync(2),
syncfs(2)