getting previous day. Post: 302398648

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Top Forums Shell Programming and Scripting getting previous day. Post 302398648 by kshji on Thursday 25th of February 2010 07:00:56 AM

02-25-2010

Registered User

ksh93 include printf extension. Gnu date command include also epoc + calculation extensions. Some bsd date include -r option.
Ex. using ksh93

Code:

   printf "%T" now

More example to use printf and date calculation.

Or using gnu date command like

Code:

#!/someposixsh
epoc=$(date -u +%s)

echo $epoc
(( yesterday=epoc-86400 ))

datestr=$(date -d "1970-01-01  $epoc seconds"  )
echo  $datestr
datestr=$(date -d "1970-01-01  $epoc seconds" '+%Y-%m-%d %H:%M:%S' )
echo  $datestr
echo "yesterday:"
date -d "1970-01-01  $yesterday seconds" '+%Y-%m-%d %H:%M:%S'

If using date, read your man date.

kshji

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