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Help on Dates in Shell Scripting

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# 8  
Old 07-16-2013
Hi Experts,

GNU date is not supporting in my UNIX prompt, so based on today's date how can i get the first day' of the month. i want the first date of the month.

for example:

if current date is 16/07/2013, i want the 01/07/2013. i mean first of the month.

Thanks,
Last edited by learner24; 07-16-2013 at 02:47 AM.. Reason: Spell check
# 9  
Old 07-16-2013
I am not sure if this is what you need..just check out..

Code:
$ date "+%d/%m/%Y"  | awk -F"/" '{print "01"FS$2FS$3}' 
01/07/2013

# 10  
Old 07-16-2013
Hi Experts,

Thanks, this is working for current month, if we pass a different date like 12/06/2013, will this work?

how can we modify the code to take any date and get the first day of that month.

for example:

if we have input as 12/06/2013,the first date of the month is 01/06/2013.

how can we do this?

thanks in davance.

regards,
# 11  
Old 07-16-2013
Code:
$ echo "12/06/2013" | awk -F"/" '{print "01"FS$2FS$3}' 
01/06/2013
$ echo "31/12/2013" | awk -F"/" '{print "01"FS$2FS$3}' 
01/12/2013

# 12  
Old 07-16-2013
Hi Experts,

can i store this value in variable like.

Code:
inputdate=12/06/2013

Code:
date= echo "inputdate" | awk -F"/" '{print "01"FS$2FS$3}'

echo $date

output: Expected
01/06/2013

regards,
Last edited by Scott; 07-16-2013 at 03:08 AM.. Reason: Code tags, please...
# 13  
Old 07-16-2013
Yes. I would suggest you to give an attempt and try something yourself before posting.

Code:
date=$(echo $inputdate | awk -F"/" '{print "01"FS$2FS$3}')

# 14  
Old 07-16-2013
Hi Experts,

I tired this.

Code:
#!/bin/ksh

inputdate=15/07/2013

year=`expr substr $inputdate 7 4`
month=`expr substr $inputdate 4 2`

FROM_DATE=01/$month/$year
echo $month
echo $year
echo $FROM_DATE

let me know if correct?

---------- Post updated at 02:01 AM ---------- Previous update was at 01:26 AM ----------

Hi Experts,

i am using the below code get the date of previous day.

Code:
#!/usr/bin/ksh

datestamp=`date '+%Y%m%d'`
yest=$((datestamp -1))
echo $yest

When i execute the code i am getting output as:

20130715

What i am trying here is, based on the date passed i am fetching previus day's date.

for example:

If date passed is date = 16/07/2013, i need date of previous day

15/07/2013 but now i am getting output as 20130715, how can i convert this to format 15/07/2013

Thanks in advance.
Last edited by Scott; 07-16-2013 at 04:09 AM.. Reason: Code tags, PLEASE
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