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# 1  
Old 06-26-2014
Minus 5 minutes
Hi,

I need to subtract 5 minutes from the date. Example

$date +"%Y-%m-%d-%H.%M.%S" displays 2014-06-26-06.06.38

I want to show it as 2014-06-26-06.01.38 (5 mins are subtracted from date)

Any help would be appreciated. I am currently on AIX version 6.1

-Vrushank
# 2  
Old 06-26-2014
With the fairly common -d flag not being available for AIX, I've cobbled together this:-
Code:
date
perl -e 'print scalar localtime(time - 300), "\n";'

THis gives you the calculation, but the output may not be correct. Is this sufficient or do you need the format?



Robin
These 2 Users Gave Thanks to rbatte1 For This Post:
Makarand Dodmis vrupatel
# 3  
Old 06-26-2014
Thanks Robin, but I need it in "%Y-%m-%d-%H.%M.%S" format

Regards,
Vrushank Patel
Last edited by vbe; 06-26-2014 at 08:57 AM..
# 4  
Old 06-26-2014
Let's try this then:-
Code:
date +%Y-%m-%d-%H.%M.%S
perl -e 'use POSIX qw(strftime);print scalar(strftime "%Y-%m-%d-%H.%M.%S" , localtime(time - 300)), "\n";'

The first date is just to show the difference.


The bold red bit is the seconds to set the clock back, so you can adjust this as you may need.

It seems to work for me on AIX 4.3.3, 5.1 and 6.1

Can anyone suggest a neater way of doing this?

Robin
These 2 Users Gave Thanks to rbatte1 For This Post:
Don Cragun vrupatel
# 5  
Old 06-26-2014
Thanks Robin. That seems to be working as expected at my end. Thank you very much
# 6  
Old 06-26-2014
You are welcome for the answer and I forgot to say welcome to the forum.

Thanks for the question. Perhaps others will find it useful in future. I learned something working it out too.

Smilie



Robin
# 7  
Old 06-26-2014
Quote:
Originally Posted by rbatte1
Can anyone suggest a neater way of doing this?
Perl is about the only portable option for date math, and as perl oneliners go that's both short and readable.
These 2 Users Gave Thanks to Corona688 For This Post:
rbatte1 vrupatel
 
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