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Top Forums Shell Programming and Scripting Help with Backup Shell Script Post 302767121 by vino1989 on Wednesday 6th of February 2013 09:36:03 AM
Old 02-06-2013
Help with Backup Shell Script

i need to print the first date of the previous month in 20130101 format.

i use the below script
Code:
month_year=$(date +'%m%Y' | awk '!--$1{$1=12;$2--}')
m=${month_year% *}
y=$month_year##* }
d=$(cal $m $y | paste -s - | awk '{print $NF}')
firstdate=${printf '02d01%s' $y $m)
echo $firstdate

it print as "2013101"

any one can help me on this to print 20130101 as yyyymmdd format

---------- Post updated at 08:57 AM ---------- Previous update was at 08:56 AM ----------

thanks in advance

---------- Post updated at 09:36 AM ---------- Previous update was at 08:57 AM ----------

i m using

Code:
month_year=$(date +'%m%Y' | awk '!--$1{$1=12;$2--}')
m=${month_year% *}
y=$month_year##* }
d=$(cal $m $y | paste -s - | awk '{print $NF}')
firstdate=${printf '%s01%02d' $y $m)
echo $firstdate


the output is as 20130101


i m getting the correct o/p
thanks

Last edited by Franklin52; 02-06-2013 at 10:44 AM.. Reason: Please use code tags for data and code samples
 

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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)
All times are GMT -4. The time now is 02:03 PM.
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