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Top Forums UNIX for Dummies Questions & Answers How to subtract 2 hours from 'date' in shell ( /bin/sh ) script ? Post 2794 by yairon on Tuesday 5th of June 2001 03:11:57 AM
Old 06-05-2001
Question 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.
yairon
 

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tcopy(1)							   User Commands							  tcopy(1)

NAME
tcopy - copy a magnetic tape SYNOPSIS
tcopy source [destination] DESCRIPTION
The tcopy utility copies the magnetic tape mounted on the tape drive specified by the source argument. The only assumption made about the contents of a tape is that there are two tape marks at the end. When only a source drive is specified, tcopy scans the tape, and displays information about the sizes of records and tape files. If a des- tination is specified, tcopy makes a copies the source tape onto the destination tape, with blocking preserved. As it copies, tcopy pro- duces the same output as it does when only scanning a tape. The tcopy utility requires the use of Berkeley-compatible device names. For example, example% tcopy /dev/rmt/1b /dev/rmt/2b ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWesu | +-----------------------------+-----------------------------+ SEE ALSO
mt(1), ioctl(2), attributes(5) NOTES
tcopy will only run on systems supporting an associated set of ioctl(2) requests. SunOS 5.10 10 Mar 2000 tcopy(1)
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