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Top Forums UNIX for Dummies Questions & Answers How to subtract 2 hours from 'date' in shell ( /bin/sh ) script ? Post 2851 by Optimus_P on Thursday 7th of June 2001 03:23:41 PM
Old 06-07-2001
crewd but it works.

(host):# date +%Y-%m-%d-%H-%M-%S
2001-06-07-14-25-18
(host):# date +%Y-%m-%d-%H-%M-%S|awk -F"-" '{ print $1$2$3($4-2)$5$6 }'
20010607122522

or

OLDHOUR=`date +%H|awk '{ print ($1-2) }'`
FILES=`ls -l|grep -v total|awk '{ print $8 }'|awk -F":" '{ print $1 }'`
echo ${OLDHOUR}
echo ${FILES}

for i in `ls`;do
if [[ ${FILES} -le ${OLDHOUR} ]]; then
echo "This file ($i) is older then 2 hours from the current time"
fi
done
--- OUTPUT---
(host):# ./time.ksh
13
10 10 15 15 10
./time.ksh[6]: 10^J10^J15^J15^J10: syntax error

you would have to work out the FILES variable cuz there is a ^J in there and i dont know how to get rid of it. it seems to be comming from the -F option.

Last edited by Optimus_P; 06-07-2001 at 05:40 PM..
 

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TZSELECT(8)						      System Manager's Manual						       TZSELECT(8)

NAME
tzselect - select a time zone SYNOPSIS
tzselect DESCRIPTION
The tzselect program asks the user for information about the current location, and outputs the resulting time zone description to standard output. The output is suitable as a value for the TZ environment variable. All interaction with the user is done via standard input and standard error. ENVIRONMENT VARIABLES
AWK Name of a Posix-compliant awk program (default: awk). TZDIR Name of the directory containing time zone data files (default: /usr/local/etc/zoneinfo). FILES
TZDIR/iso3166.tab Table of ISO 3166 2-letter country codes and country names. TZDIR/zone.tab Table of country codes, latitude and longitude, TZ values, and descriptive comments. TZDIR/TZ Time zone data file for time zone TZ. EXIT STATUS
The exit status is zero if a time zone was successfully obtained from the user, nonzero otherwise. SEE ALSO
newctime(3), tzfile(5), zdump(8), zic(8) TZSELECT(8)
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