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Top Forums Shell Programming and Scripting how to get what date was 28 days ago of the current system date IN UNIX Post 302405216 by kandi.reddy on Thursday 18th of March 2010 06:53:08 AM
Old 03-18-2010
date +%Y-%m-%d --date='28 day ago'

With the above command it will give the current date...

I need what date it was 28 days ago from the todays date.
kandi.reddy
 

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STRIPCHART(5)							File Formats Manual						     STRIPCHART(5)

NAME
stripchart - draws diagrams from data with PHP SYNOPSIS
The script is expected to be called as a CGI script but also works from the command line. DESCRIPTION
Stripchart prepares a series of diagrams directly from raw data. It is handy for web pages that need some graphics without too much over- head. OPTIONS
-i input FILE name of input data file (mandatory) -o output FILE name of output .gif file (default: STDOUT) -O output FILE name of output .gif file, also dumps to STDOUT -f from TIME stripchart with data starting at TIME (default: 24 hours ago) -t to TIME stripchart with data ending at TIME (default: now) -r range RANGE stripchart data centered around "from" time the size of RANGE (overrides -t) -l last LINES stripchart last number of LINES in data file (overrides -f and -t and -r) -T title TITLE title to put on graphic (default: FILE RANGE) -x column X time or "x" column (default: 2) -y column Y value or "y" column (default: 3) -Y column Y' overplot second "y" column (default: none) -b baseline VALUE overplot baseline of arbitrary value VALUE -B baseline-avg overrides -b, it plots baseline of computed average -d dump low VALUE ignore data less than VALUE -D dump high VALUE ignore data higher than VALUE -v verbose puts verbose runtime output to STDERR -L log makes y axis log scale -c colors "COLORS" set gnuplot colors for graph/axisnts/data (default: "xffffff x000000 xc0c0c0 x00a000 x0000a0 x2020c0" in order: bground, axisnts, grids, pointcolor1,2,3) -C cgi output CGI header to STDOUT if being called as CGI -s stats turn extra plot stats on (current, avg, min, max) -j julian times time columns is in local julian date (legacy stuff) -V version print version number and exit -h help display this help NOTES
* TIME either unix date, julian date, or civil date in the form: YYYY:MM:DD:HH:MM (year, month, day, hour, minute) If you enter something with colons, it assumes it is civil date If you have a decimal point, it assumes it is julian date If it is an integer, it assumes it is unix date (epoch seconds) If it is a negative number, it is in decimal days from current time (i.e. -2.5 = two and a half days ago) * All times on command line are assumed to be "local" times * All times in the data file must be in unix date (epoch seconds) * RANGE is given in decimal days (i.e. 1.25 = 1 day, 6 hours) * if LINES == 0, (i.e. -l 0) then the whole data file is read in * columns (given with -x, -y, -Y flags) start at 1 * titles given with -T can contain the following key words which will be converted: FILE - basename of input file RANGE - pretty civil date range (in local time zone) the default title is: FILE RANGE AUTHORS
Matt Lebofsky 2.21 November 2002 STRIPCHART(5)
All times are GMT -4. The time now is 05:20 PM.
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