---
name: "flow-split"
section: "1"
platform: "linux"
package: "flow-tools"
version: "1:0.68-12.5+b3"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/flow-split"
---

# flow-split(1)

Split flow files into smaller files.

## NAME

**flow-split** — Split flow files into smaller files.

## SYNOPSIS

**flow-split** \[-gGhn\]  \[-b *big*\|*little*\]  \[-C *comment*\]  \[-d *debug\_level*\]  \[-N *nflows*\]  \[-o *outfile\_basename*\]  \[-T *nseconds*\]  \[-z *z\_level*\]

## DESCRIPTION

The **flow-split** utility will split a flow file into smaller files based on the the number of flows or the ammount of time that has passed.

## OPTIONS

- \-b *big*\|*little*

  Byte order of output.

- \-C *Comment*

  Add a comment.

- \-d *debug\_level*

  Enable debugging.

- \-g

  Split on source tag.

- \-G

  Split on destination tag.

- \-h

  Display help.

- \-n

  Use symbols for tag field in filename.

- \-N *nflows*

  Split after processing *nflows*.

- \-o *outfile\_basename*

  The basename of the resulting files.

- \-T *nsecond*

  Split after processing an interval of *nseconds* flows.

- \-z *z\_level*

  Configure compression level to  *z\_level*.  0 is disabled (no compression), 9 is highest compression.

## EXAMPLES

Create 1 minute flow files from the flow archive in **/flows/krc4**.  Store the results in **/flows/krc4.split**

  **flow-cat /flows/krc4 \| flow-split -T60 -o /flows/krc4.split/1min**.

## BUGS

None known.

## AUTHOR

Mark Fullmer maf@splintered.net

## SEE ALSO

[**flow-tools**(1)](/flow-tools/1.md)