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Full Discussion: Need to go back 1 day using the date command
Top Forums UNIX for Dummies Questions & Answers Need to go back 1 day using the date command Post 7623 by 98_1LE on Friday 28th of September 2001 11:11:41 AM
Old 09-28-2001
This script was posted here some time ago, and I modified it slightly.
Code:
#!/usr/bin/ksh
date '+%m %d %Y' | 
{ 
read MONTH DAY YEAR
DAY=`expr "$DAY" - 1` 
case "$DAY" in 
        0) 
           MONTH=`expr "$MONTH" - 1` 
                case "$MONTH" in 
                        0) 
                           MONTH=12 
                           YEAR=`expr "$YEAR" - 1` 
                        ;; 
                esac 
        DAY=`cal $MONTH $YEAR | grep . | fmt -1 | tail -1` 
esac 
echo "Yesterday was: $MONTH $DAY $YEAR" 
}

This User Gave Thanks to 98_1LE For This Post:
dmndalsol
 

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LEARN ABOUT DEBIAN

bb-datepage.cgi

BB-DATEPAGE.CGI(1)					      General Commands Manual						BB-DATEPAGE.CGI(1)

NAME

       bb-datepage.cgi - Xymon CGI script to view pre-built reports by date

SYNOPSIS

       bb-datepage.cgi?type={day,week,month} --url=URLPREFIX [options]

DESCRIPTION

       bb-datepage.cgi is invoked as a CGI script via the bb-datepage.sh CGI wrapper.

       bb-datepage.cgi	is  passed  a  QUERY_STRING  environment variable with the type of time-selection that is desired: Either "day", "week" or
       "month" can be requested. It will then generate a web form with appropriate day/week/month selection boxes, and based on the users'  selec-
       tion a resulting url is built from the URLPREFIX and the time selection.  The browser is then redirected to this URL.

       The  URL  is  constructed from the URLPREFIX, the type-parameter, the value of the "pagepath" or "host" cookie, and the users' selection as
       follows:

       type=day
	      The final URL is URLPREFIX/daily/YEAR/MONTH/DAY/PAGEPATH.

       type=week
	      The final URL is URLPREFIX/weekly/YEAR/WEEK/PAGEPATH.

       type=month
	      The final URL is URLPREFIX/monthly/YEAR/MONTH/PAGEPATH.

	      YEAR is the full year (4 digits, including century). MONTH is the two-digit number of the month (01..12). DAY is the number  of  the
	      day in the month (01..31). WEEK is the ISO 8601:1988 week-number (01..53). PAGEPATH is the current value of the "pagepath" cookie if
	      set; if it is not set but the "host" cookie is set, then this host is looked up in the bb-hosts file and the page where this host is
	      found is used for PAGEPATH. These two cookies are set by the default web-header templates supplied with Xymon.

OPTIONS

       --url=URLPREFIX
	      This specifies the initial part of the final URL. This option is required.

       --hffile=FILENAME
	      Specifies the template files (from $BBHOME/web/) to use. The default is "--hffile=report".

       --color=COLOR
	      Sets the background color of the generated webpage. The default is blue.

       --env=FILENAME
	      Loads the environment defined in FILENAME before executing the CGI script.

       --debug
	      Enables debugging output.

       $BBHOME/web/report_form_daily
	      HTML form template for the date selection form when type=daily.

       $BBHOME/web/report_form_weekly
	      HTML form template for the date selection form when type=weekly.

       $BBHOME/web/report_form_monthly
	      HTML form template for the date selection form when type=monthly.

       $BBHOME/web/report_header
	      HTML header file for the generated web page

       $BBHOME/web/report_footer
	      HTML footer file for the generated web page

ENVIRONMENT VARIABLES

       BBHOME Used to locate the template files for the generated web pages.

       QUERY_STRING
	      Contains the parameters for the CGI script.

SEE ALSO

       bbgen(1), bb-hosts(5), hobbitserver.cfg(5)

Xymon							    Version 4.2.3:  4 Feb 2009						BB-DATEPAGE.CGI(1)
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