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Full Discussion: Deleting file basing on the timestamp substring in the file name
Top Forums UNIX for Dummies Questions & Answers Deleting file basing on the timestamp substring in the file name Post 302888758 by bakunin on Monday 17th of February 2014 07:23:23 AM
Old 02-17-2014
Quote:
Originally Posted by thuyetti
May I ask you to explain me about " $TS -gt $some_int -a $TS -lt $other_int " .
You might want to look at the man page of "test":

-lt: "lower than", checks if value1 is lower than value2
-a: "logical and" connects two conditions with an AND
-gt: "greater than", checks if value1 is greater than value2

So in fact it reads ...if $TS is greater than $some_int AND $TS is lower than $other_int, "some_int > TS > other_int", for short.

I hope this helps.

bakunin
 

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LEARN ABOUT DEBIAN

sextractor

SEXTRACTOR(1)							   User Commands						     SEXTRACTOR(1)

NAME

       sextractor - extract a source catalog from an astronomical FITS image

SYNOPSIS

       sextractor image [-c configuration-file]
	      [-parameter1 value1 -parameter2 value2 ...]

       sextractor image_detect image_measure [-c configuration-file]
	      [-parameter1 value1 -parameter2 value2 ...]

       sextractor -d

DESCRIPTION

       SExtractor  is a program that builds a catalogue of objects from an astronomical image. Although it is particularly oriented towards reduc-
       tion of large scale galaxy-survey data, it performs rather well on moderately crowded star fields.
       On Debian systems, sample SExtractor parameter files are installed to /usr/share/sextractor.

   Operation modes:
       -h, --help
	      print this help, then exit

       -V, --version
	      print version number, then exit

       -d, --dump
	      dump a default configuration file

EXAMPLE

       For a minimal sextractor run, without customizing any of the parameters, use

       sextractor file.fits -c /usr/share/sextractor/default.sex -PARAMETERS_NAME /usr/share

AUTHOR

       Written by Emmanuel Bertin (Institut d'Astrophysique de Paris and Observatoire de Paris).

       Copyright 1994-2005 Emmanuel Bertin
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

REPORTING BUGS

       Report bugs to <sextractor@iap.fr>.

       The  full  documentation for SExtractor is maintained as a Postscript manual available at http://terapix.iap.fr/soft/sextractor ; on Debian
       systems, it is also installed to /usr/share/doc/sextractor/.

SExtractor 2.8.6						   January 2013 						     SEXTRACTOR(1)
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