06-05-2001
How to subtract 2 hours from 'date' in shell ( /bin/sh ) script ?
I write a sh script that zip and copy to tape all files that older then 2 hours.
1. The way I choose is - touch a file with "now - 2 hours", then use fine with '! -newer'
2. Do you have any other idea to do it ?
tnx.
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LEARN ABOUT DEBIAN
timetrans
TIMETRANS(1p) User Contributed Perl Documentation TIMETRANS(1p)
NAME
timetrans - Converts time into time
SYNOPSIS
timetrans [units-options] [-count]
DESCRIPTION
timetrans converts time from one type of unit to another. If any of the units options are specified, then timetrans will convert those
time units into the number of seconds to which they add up. If given the count option, timetrans will convert that number of seconds into
the appropriate number of weeks, days, hours, minutes, and seconds. The converted result is printed out. Units options cannot be
specified in the same execution as the count option, and vice versa.
timetrans is intended for use with DNSSEC-Tools, for calculating a zone's expiration time.
OPTIONS
Units Options
The converted value of each unit is totaled and a single result printed.
-seconds seconds
Count of seconds to convert to seconds.
-minutes minutes
Count of minutes to convert to seconds.
-hours hours
Count of hours to convert to seconds.
-days days
Count of days to convert to seconds.
-weeks weeks
Count of weeks to convert to seconds.
Count Option
The specified seconds count is converted to the appropriate number of weeks, days, hours, minutes, and seconds.
-count seconds
Count of seconds to convert to the appropriate set of units.
Other Options
timetrans has the following miscellaneous options.
-Version
Displays the version information for timetrans and the DNSSEC-Tools package.
EXAMPLES
Example 1: Converting 5 days into seconds
$(42)> timetrans -days 5
432000
Example 2: Converting 2 weeks into seconds
$(43)> timetrans -w 2
1209600
Example 3: Converting 8 days and 8 hours into seconds
$(44)> timetrans -d 8 -hours 8
720000
Example 4: Converting 1 week, 1 day, and 8 hours into seconds
$(46)> timetrans -w 1 -days 1 -h 8
720000
Example 5: Converting 14 weeks, 4 days, 21 hours, 8 minutes, and 8 seconds into seconds
$(47)> timetrans -w 14 -d 4 -h 21 -m 8 -s 8
8888888
Example 6: Converting 720000 seconds into time units
$(48)> timetrans -c 720000
1 week, 1 day, 8 hours
Example 7: Converting 1814421 seconds into time units
$(49)> timetrans -c 1814421
3 weeks, 21 seconds
Example 8: Converting 8888888 seconds into time units
$(50)> timetrans -c 8888888
14 weeks, 4 days, 21 hours, 8 minutes, 8 seconds
COPYRIGHT
Copyright 2004-2012 SPARTA, Inc. All rights reserved. See the COPYING file included with the DNSSEC-Tools package for details.
AUTHOR
Wayne Morrison, tewok@tislabs.com
SEE ALSO
zonesigner(8)
Net::DNS::SEC::Tools::timetrans.pm(3)
perl v5.14.2 2012-06-21 TIMETRANS(1p)