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Full Discussion: Gnuplot in bash
Top Forums Shell Programming and Scripting Gnuplot in bash Post 302906815 by Chubler_XL on Monday 23rd of June 2014 06:01:22 PM
Old 06-23-2014
Firstly your going to need to collect hourly usage data into a datafile, cron is probably the best way perhaps something like this:

Code:
for filesystem in var usr tmp
do
   df -Pm /$filesystem | awk -v d=$(date date '+%Y/%m/%d %T') 'NR==2{print d,$3,$4}' OFS="\t" >> /usr/lib/${filesystem}_disk_data
done

Once you have your data you can use gnuplot to produce the grap, below is an example for the var datafile:

Code:
#!/usr/bin/gnuplot

set terminal png font "helvetica"
set output 'var_graph.png'

# For pdf output (requires ps2pdf) replace with below
# set terminal postscript landscape color
# set output '| ps2pdf - var_usage.pdf'

set title "Var filesystem usage over Time"
set timestamp "Last updated: %m/%d/%Y, %H:%M" top

set xlabel "Date (mm/yy)"
set timefmt "%Y/%m/%d %H:%M"
set xdata time
set format x "%m/%Y"

set ylabel "GB"
set yrange [ 0 : ]

set key left
set grid
set datafile separator "\t"

show variables

plot '/usr/lib/var_disk_data'     using 1:2 t 'Used' with lines

 

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LEARN ABOUT POSIX

ps2pdf

PS2PDF(1)							    Ghostscript 							 PS2PDF(1)

NAME

       ps2pdf - Convert PostScript to PDF using ghostscript
       ps2pdf12 - Convert PostScript to PDF 1.2 (Acrobat 3-and-later compatible) using ghostscript
       ps2pdf13 - Convert PostScript to PDF 1.3 (Acrobat 4-and-later compatible) using ghostscript

SYNOPSIS

       ps2pdf  [options...] {input.[e]ps|-} [output.pdf|-]
       ps2pdf12  [options...] {input.[e]ps|-} [output.pdf|-]
       ps2pdf13  [options...] {input.[e]ps|-} [output.pdf|-]

DESCRIPTION

       The ps2pdf scripts are work-alikes for nearly all the functionality (but not the user interface) of Adobe's Acrobat(TM) Distiller(TM) prod-
       uct: they convert PostScript files to Portable Document Format (PDF) files.

       If the output filename is not specified, the output is placed is a file of the same name with a '.pdf' extension. Either the input filename
       or the output filename can be '-' to request reading from stdin or writing to stdout, respectively, when used as a filter.

       The three scripts differ as follows:

       -      ps2pdf12 will always produce PDF 1.2 output (Acrobat 3-and-later compatible).

       -      ps2pdf13 will always produce PDF 1.3 output (Acrobat 4-and-later compatible).

       -      ps2pdf  per se currently produces PDF 1.4 output.  However, this may change in the future. If you care about the compatibility level
	      of the output, use ps2pdf12 or ps2pdf13, or use the -dCompatibility=1.x switch in the command line.

       There are some limitations in ps2pdf's conversion. See the HTML documentation for more information. A large number of  Adobe  Distiller(TM)
       parameters  which  can  be  used to control the conversion are also documented there, including instructions for generating PDF/X and PDF/A
       documents.

OPTIONS

       The ps2pdf scripts use the same options as gs(1).

EXAMPLES

       Converting a figure.ps to figure.pdf:

	      ps2pdf figure.ps

       A conversion with more specifics:

	      ps2pdf -dPDFSETTINGS=/prepress figure.ps proof.pdf

       Converting as part of a pipe:

	      make_report.pl -t ps | ps2pdf -dCompatibility=1.3 - - | lpr

SEE ALSO

       gs(1), ps2pdfwr(1),
       Ps2pdf.htm in the Ghostscript documentation

BUGS

       See http://bugs.ghostscript.com/ and the Usenet news group comp.lang.postscript.

VERSION

       This document was last revised for Ghostscript version 8.70.

AUTHOR

       Artifex Software, Inc. are the primary maintainers of Ghostscript.  This manpage by George Ferguson.

8.70								   31 July 2009 							 PS2PDF(1)
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