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Full Discussion: Script creates additional file
Operating Systems Linux Red Hat Script creates additional file Post 303000816 by MadeInGermany on Thursday 20th of July 2017 07:27:02 AM
Old 07-20-2017
[[ ]] and [ ] work similar, but the implementation is different.
Code:
$ type [
[ is a shell builtin
$ type [[
[[ is a shell keyword

The [ is a builtin command. In fact it is an alias of the test command. (When run as [ the last argument must be ]. Command arguments may be redirected with < and >, and that is what caused your problem. The redirection can be prevented by quoting "<" ">" or \< \>, but the standard operators are -lt and -gt. As with all command arguments, you should use "quotes" to prevent word splitting and globbing.
The [[ ]] is a compound, built into the shell interpreter. Because it is not a command, its content can be freely designed, and in fact a < and > are valid integer comparators. And the values are not subject to globbing, and word splitting happens before variable substitution (i.e. you need to quote "two words" to be seen as one value but not $word even if it's value is "two words").
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LEARN ABOUT DEBIAN

bb-datepage.cgi

BB-DATEPAGE.CGI(1)					      General Commands Manual						BB-DATEPAGE.CGI(1)

NAME

       bb-datepage.cgi - Xymon CGI script to view pre-built reports by date

SYNOPSIS

       bb-datepage.cgi?type={day,week,month} --url=URLPREFIX [options]

DESCRIPTION

       bb-datepage.cgi is invoked as a CGI script via the bb-datepage.sh CGI wrapper.

       bb-datepage.cgi	is  passed  a  QUERY_STRING  environment variable with the type of time-selection that is desired: Either "day", "week" or
       "month" can be requested. It will then generate a web form with appropriate day/week/month selection boxes, and based on the users'  selec-
       tion a resulting url is built from the URLPREFIX and the time selection.  The browser is then redirected to this URL.

       The  URL  is  constructed from the URLPREFIX, the type-parameter, the value of the "pagepath" or "host" cookie, and the users' selection as
       follows:

       type=day
	      The final URL is URLPREFIX/daily/YEAR/MONTH/DAY/PAGEPATH.

       type=week
	      The final URL is URLPREFIX/weekly/YEAR/WEEK/PAGEPATH.

       type=month
	      The final URL is URLPREFIX/monthly/YEAR/MONTH/PAGEPATH.

	      YEAR is the full year (4 digits, including century). MONTH is the two-digit number of the month (01..12). DAY is the number  of  the
	      day in the month (01..31). WEEK is the ISO 8601:1988 week-number (01..53). PAGEPATH is the current value of the "pagepath" cookie if
	      set; if it is not set but the "host" cookie is set, then this host is looked up in the bb-hosts file and the page where this host is
	      found is used for PAGEPATH. These two cookies are set by the default web-header templates supplied with Xymon.

OPTIONS

       --url=URLPREFIX
	      This specifies the initial part of the final URL. This option is required.

       --hffile=FILENAME
	      Specifies the template files (from $BBHOME/web/) to use. The default is "--hffile=report".

       --color=COLOR
	      Sets the background color of the generated webpage. The default is blue.

       --env=FILENAME
	      Loads the environment defined in FILENAME before executing the CGI script.

       --debug
	      Enables debugging output.

       $BBHOME/web/report_form_daily
	      HTML form template for the date selection form when type=daily.

       $BBHOME/web/report_form_weekly
	      HTML form template for the date selection form when type=weekly.

       $BBHOME/web/report_form_monthly
	      HTML form template for the date selection form when type=monthly.

       $BBHOME/web/report_header
	      HTML header file for the generated web page

       $BBHOME/web/report_footer
	      HTML footer file for the generated web page

ENVIRONMENT VARIABLES

       BBHOME Used to locate the template files for the generated web pages.

       QUERY_STRING
	      Contains the parameters for the CGI script.

SEE ALSO

       bbgen(1), bb-hosts(5), hobbitserver.cfg(5)

Xymon							    Version 4.2.3:  4 Feb 2009						BB-DATEPAGE.CGI(1)
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