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| 1 | .TH SYNC 8
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| 2 | .SH NAME
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| 3 | sync \- flush the cache to disk
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| 4 | .SH SYNOPSIS
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| 5 | \fBsync\fR
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| 6 | .br
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| 7 | .de FL
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| 8 | .TP
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| 9 | \\fB\\$1\\fR
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| 10 | \\$2
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| 11 | ..
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| 12 | .de EX
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| 13 | .TP 20
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| 14 | \\fB\\$1\\fR
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| 15 | # \\$2
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| 16 | ..
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| 17 | .SH EXAMPLES
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| 18 | .EX "sync" "Write out all modified cache blocks"
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| 19 | .SH DESCRIPTION
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| 20 | .PP
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| 21 | \s-1MINIX 3\s-1
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| 22 | maintains a cache of recently used disk blocks.
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| 23 | The
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| 24 | .I sync
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| 25 | command writes any modified cache blocks back to the disk.
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| 26 | This is essential before stopping the system, and should be done before
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| 27 | running any
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| 28 | .I a.out
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| 29 | program that might crash.
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| 30 | .SH "SEE ALSO"
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| 31 | .BR sync (2),
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| 32 | .BR update (8),
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| 33 | .BR shutdown (8).
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