These are scripts I use for recording and working with (eg, graphing)
network bandwidth usage.

Here is what's what (as of this writing, at least).

cronjob
	Designed to be run from cron (or moral equivalent) at whatever
	sampling interval you want to use.  For my use, I usually run
	this every five minutes; if I considered more detailed data
	important enough to be worth five times the recorded space
	used, I could run it every minute.  You can even run it more
	frequently than that, if you have a cron-like facility with
	sub-minute scheduling granularity, though I'm not sure all the
	scripst will deal well with that.

	This script deals with keeping multiple logfiles, one per day.
	(Changing that to, eg, one per week or one per month would not
	be difficult, but it would not be just flipping a config
	switch, either.  Some of the other scripts might also need
	fiddling.)

	You will need to edit this script to list the interfaces you
	want to monitor.  You do this by changing the interfaces listed
	in the for loop around line ten or so; the list there is just
	an example and is unlikely to be correct for your purposes.

	You will need to edit this script to change the directory name
	in the cd command at the beginning to match where you have
	installed it.

genday
genweek
gencommon
	These are scripts to generate graphs.  gencommon is a large
	blob of common code, used by the other two; it is not suitable
	for running on its own.  The difference between genday and
	genweek is that genday graphs the last 24 hours; genweek the
	last 7*24=168 hours.  (This is more than just a question of how
	much data to graph because it also affects X-axis labels and
	lines.)

	By default, these graph all interfaces they find in the data.
	You can restrict it by naming one or more interfaces as
	arguments, in which case any interfaces not listed will be
	dropped.  (It is not an error to name an interface which does
	not appear in the data.)

	These scripts start repeating colours if they display more than
	four interfaces.  You can change the list of colours by editing
	the ci0, co0, ci1, co1, etc, settings in gencommon; if you
	change the number of colours, also change ncols.

	gencommon depends on count and ppmplot, also available from my
	git repo area, and the daytime-num program in this repo.

	I intend to add an option to allow some kind of manual control
	of the Y scale; it currently is entirely automatic.

	You will need to edit genday and genweek to change the
	directory names in the cd commands at their beginnings to match
	where you have installed them.

daytime-num.c
	A program for converting between YYYY-MM-DD date format and
	"days since 1970-01-01", and between HH:MM:SS time format and
	"seconds since 00:00:00".  Not intended to be general-purpose.

movelog
	An auxiliary script to move old logfiles into per-month
	subdirectories of per-year directories.  This is done at the
	beginning of genday and genmonth.

bytespersec.awk
pktsize.awk
pktspersec.awk
prejumps.awk
	awk scripts to compute various possibly-interesting things from
	recorded data.  They are old and little-used and, as a result,
	poorly maintained; they might not even work at all any more.  I
	rarely use much but genday and genweek to look at data now.

/~\ The ASCII				  Mouse
\ / Ribbon Campaign
 X  Against HTML		mouse@rodents-montreal.org
/ \ Email!	     7D C8 61 52 5D E7 2D 39  4E F1 31 3E E8 B3 27 4B