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Full Discussion: Script has no result!! -gt -lt
Top Forums Shell Programming and Scripting Script has no result!! -gt -lt Post 302960986 by Don Cragun on Sunday 22nd of November 2015 08:01:14 PM
Old 11-22-2015
Quote:
Originally Posted by Aia
There MUST be spaces between the brackets and condition. Right now there is not.
Code:
if [[ $up -gt 365 ]] && [[ $up -lt 730 ]]; then

Do not know what you are try to accomplish here:
Code:
echo "$hostname | $up |  Running over than one year."

Hi Aia,
With test expression and with [ expression ], you are absolutely correct; the elements of expression and the command name must be separated by spaces. But since [[ and ]] are part of the grammar of the shell (not built-in utilities), spaces are not required in these scripts.

The echo seems pretty obvious to me (although extremely misleading). I would expect that a system that had been up for three years to print that line, but the code shown in scripts 1 and 3 will not print that line if the system has been up for 730 or more days. And, of course, script 2 might or might not print that line, but whether or not that line is printed has nothing to do with how long the system has been up.
This User Gave Thanks to Don Cragun For This Post:
getrue
 

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LEARN ABOUT DEBIAN

paps

PAPS(1) 						      General Commands Manual							   PAPS(1)

NAME

       paps - UTF-8 to PostScript converter using Pango

SYNOPSIS

       paps [options] files...

DESCRIPTION

       paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves
       through the pango ft2 backend.

OPTIONS

       These programs follow the usual GNU command line syntax, with long options starting with  two  dashes  (`-').   A  summary  of  options	is
       included below.

       --landscape
	      Landscape output. Default is portrait.

       --columns=cl
	      Number of columns output. Default is 1.
	      Please notice this option isn't related to the terminal length as in a "80 culums terminal".

       --font=desc
	      Set the font description. Default is Monospace 12.

       --rtl  Do right to left (RTL) layout.

       --paper ps
	      Choose paper size. Known paper sizes are legal, letter and A4. Default is A4.

       Postscript points
	      Each postscript point equals to 1/72 of an inch. 36 points are 1/2 of an inch.

       --bottom-margin=bm
	      Set bottom margin. Default is 36 postscript points.

       --top-margin=tm
	      Set top margin. Default is 36 postscript points.

       --left-margin=lm
	      Set left margin. Default is 36 postscript points.

       --right-margin=rm
	      Set right margin. Default is 36 postscript points.

       --gutter-width=gw
	      Set gutter width. Default is 40 postscript points.

       --help Show summary of options.

       --header
	      Draw page header for each page.

       --markup
	      Interpret the text as pango markup.

       --lpi  Set the lines per inch. This determines the line spacing.

       --cpi  Set the characters per inch. This is an alternative method of specifying the font size.

       --stretch-chars
	      Indicates  that  characters  should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops
	      behaviour.

AUTHOR

       paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>.

       This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others).

								  April  17, 2006							   PAPS(1)
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