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Top Forums Shell Programming and Scripting Getting previous hour in formatted form Post 302511119 by Amutha on Wednesday 6th of April 2011 03:05:22 AM
Old 04-06-2011
Quote:
Originally Posted by methyl
Why is the parameter value "6" ?
Do you mean:
Please list all the files you would expect to search when the parameter is value "6".

yes what you meant is rite. i need to get the list like this. the duration might be different and the date also might be different depending upon the user is passing it.

---------- Post updated 04-06-11 at 02:05 AM ---------- Previous update was 04-05-11 at 11:34 PM ----------

Quote:
Originally Posted by Chubler_XL
If you have GNU date (accepts -d), this should do it.

Convert date+time to epoch time using %s format (seconds past epoch date).
Once you have the date+time as epoch time you can navigate forwards and backwards by just adding or subtracting the number of secs required (eg 3600 for 1 hour).
Use the GNU -d @<epochsecs> parameter to convert back to the display format.

Code:
FMT=$( echo $1 | sed -e 's/\(.*\)-\(.*\)/\1 \2:00/')
SECS=$(date -d "$FMT" +%s)
COUNT=$2
while [ $COUNT -gt 0 ]
do
   echo logfilename.$(date -d "@$SECS" +%Y-%d-%m-%H)
   let SECS=SECS+3600
   let COUNT=COUNT-1
done


Hi Chuble,

Thank you so much.. i got what i need..
 

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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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