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Top Forums Shell Programming and Scripting Copy files from one location to another Post 302883132 by Saidul on Saturday 11th of January 2014 02:17:29 AM
Old 01-11-2014
Reference

What operating system are you using?-Ubuntu

What shell are you using?-bash

Show us your "previous day function".

Code:
#Function to get yesterday's date
get_one_day_before_date()
{
day=$1
month=$2
year=$3
if [ $day -eq 01 ]; then
        if [ $month -eq 01 ]; then
        month=12
        year=`expr $year - 1`
        else
                month=`expr $month - 1`
        if  [ $month -lt 10 ]; then
                month="0$month"
        fi
        fi
                day=`cal $month $year | awk 'NF != 0{ last = $0 }; END{ print last }' |  awk '{ print $NF }'`
          else
                        day=`expr $day - 1`
                        if  [ $day -lt 10 ]; then
                                day="0$day"
                        fi
        fi
                 yr=`echo $year`
                 echo $year$month$day
}

Code:
#get previous day's date
DD=`date +%d`
MM=`date +%m`
YY=`date +%Y`
prev_date=`get_one_day_before_date $DD $MM $YY`

Moderator's Comments:
Mod Comment Please use CODE tags so we can see the structure of your code. When you don't use CODE tags, all indentation is lost.

Last edited by Saidul; 01-11-2014 at 04:18 AM..
 

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DATE(1) 						      General Commands Manual							   DATE(1)

NAME
date - print or set the date and time SYNOPSIS
date [-qsu] [[MMDDYY]hhmm[ss]] [+format] OPTIONS
-q Read the date from stdin -s Set the time (implicit for -q or a date string) -u Print the date as GMT -t Use this number of seconds instead of current time EXAMPLES
date # Print the date and time date 0221921610 # Set date to Feb 21, 1992 at 4:10 p.m. DESCRIPTION
With the -q flag or a numeric argument, date sets the GMT time and date. MMDDYY refers to the month, day, and year; hhmmss refers to the hour, minute and second. Each of the six fields must be exactly two digits, no more and no less. date always display the date and time, with the default format for the system. The -u flag request GMT time instead of local time. A format may be specified with a + followed by a printf-like string with the following options: %% % character %A Name of the day %B Name of the month %D mm/dd/yy %H Decimal hour on 2 digits %I Decimal hour modulo 12 on 2 digits %M Decimal minute on 2 digits %S Decimal seconds on 2 digits %T HH:MM:SS %U Decimal week number, Sunday being first day of week %W Decimal week number, Monday being first day of week %X Same as %T %Y Decimal year on 4 digits %Z Time Zone (if any) %a Abbreviated name of the day %b Abbreviated name of the month %c Appropriate date & time (default format) %d Decimal day of the month on 2 digits %e Same as %d, but a space replaces leading 0 %h Same as %b %j Decimal dey of the year on 3 digits %m Decimal month on 2 digits %n Newline character %p AM or PM %r 12-hour clock time with AM/PM %s Number of seconds since the epoch %t Tab character %w Decimal day of the week (0=Sunday) %x Same as %D %y Decimal year on 2 digits SEE ALSO
time(2), ctime(3), readclock(8). DATE(1)
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