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Top Forums Shell Programming and Scripting What this switch of "if" does? Post 302270569 by Myrddin Emrys on Monday 22nd of December 2008 07:55:35 AM
Old 12-22-2008
Quote:
Originally Posted by pritam1980
Hi All

I have a script which is....

if [ "file1.log" -nt "file2.txt" ]
then
touch file2.txt
else
kill -9 `ps -ef | grep -i /opt/xxx/bin/yyy | grep -v grep | awk '{print $2}'`
fi


What does it do? specially what is this logical checking?
if [ "file1.log" -nt "file2.txt" ]
I am not able to understand the "-nt" option...


Thanks in advance

Pritam


Hello Pritam,


[Chapter 13] 13.3 Understanding Shell Scripts




"Read it is good for the mind"
 

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GCHEM3D(1)						       gnome-chemistry-utils							GCHEM3D(1)

NAME
gchem3d - a small chemical viewer application SYNOPSIS
gchem3d [OPTION(S)...] [FILE...] DESCRIPTION
gchem3d is a small chemical viewer application, which can show several chemical file formats. OPTIONS
The following options are accepted: -b COLOR, --bgcolor=COLOR Use the given color as background color. COLOR can be one of "black" (default), "white", "#rrggbb" (don't forget to escape the "#" character in the shell). -d MODEL, --display3d=MODEL Choose how molecules are displayed. MODEL can be one of "BallnStick" (default), "SpaceFill". -?, --help Show application help options. --help-all, --help-* Print all or just a group of help options. These options are not documented here. Instead see gtk-options(7) and gnome-options(7). -v, --version Print gchem3d version information. SEE ALSO
gnome-options(7), gtk-options(7) AUTHORS
Jean Brefort <jean.brefort@normalesup.org> Program author. Daniel Leidert <daniel.leidert@wgdd.de> Manpage author. COPYRIGHT
Copyright (C) 2002-2007 Jean Brefort Copyright (C) 2004-2007 Daniel Leidert Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 or any later version published by the Free Software Foundation. gcu 0.12 $Date: 2009-03-19 10:53:47 +0100 (jeu. 19 mars 2009) $ GCHEM3D(1)
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