flow-cat(1) flow-cat(1)
NAME
flow-cat — Concatenate flow files
SYNOPSIS
flow-cat [-aghmp] [-b big|little] [-C comment] [-d debug_level] [-o
filename] [-t start_time] [-T start_time] [-z z_level]
[file|directory ...]
DESCRIPTION
The flow-cat utility processes files and/or directories of files in the
flow-tools format. The resulting concatenated data set is written to
the standard output or file specified by -o. If file is a single dash
(‘-’) or absent, flow-cat will read from the standard input.
OPTIONS
-a Do not ignore filenames that begin with tmp.
-b big|little
Byte order of output.
-C Comment
Add a comment.
-d debug_level
Enable debugging.
-g Sort file list by capture start time before processing.
-h Display help.
-m Disable the use of mmap().
-p Preload headers. Use to preserve meta information such as
lost flows.
-o file Write to file instead of the standard out.
-t start_time
Select flow files up to start_time. If used with -T select
files between start_time and end_time.
-T end_time
Select flow files after end_time. If used with -t select
files between start_time and end_time.
-z z_level
Configure compression level to z_level. 0 is disabled (no
compression), 9 is highest compression.
file|directory...
Process the files and/or directory.
TIME/DATE parsing
start_time and end_time parsing is implemented with getdate.y, a
commonly used function to process free-form time date specifications.
Example usage borrowed from cvs:
1 month ago
2 hours ago
400000 seconds ago
last year
last Monday
yesterday
a fortnight ago
3/31/92 10:00:07 PST
January 23, 1987 10:05pm
22:00 GMT
EXAMPLES
Concatenate all flow files begining with ft-v05.2001-05.01, use flow-
print to display the results.
flow-cat ft-v05.2001-05-01.* | flow-print
Concatenate flow files in /flows/krc4, store store the output in
compressed.flows at compression level 9 (best). The headers are
preloaded so various metadata such as the flow count is correct in the
result. Filenames begining with tmp which are typically in-progress
flow files from flow-capture are not processed.
flow-cat -p -z9 /flows/krc4 > compressed.flows
BUGS
None known.
AUTHOR
Mark Fullmer maf@splintered.net
SEE ALSO
flow-tools(1)
flow-cat(1)