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Full Discussion: SED variable substitution
Top Forums Shell Programming and Scripting SED variable substitution Post 302359339 by bakunin on Tuesday 6th of October 2009 09:48:13 AM
Old 10-06-2009
The reason for your problem is that your variables contain spaces and a space character is interpreted by the shell as a field separator. Consider the following:

Code:
command arg1 arg2

The shell will treat "arg1" and "arg2" as different arguments. If you want these to be one argument of the form "arg1 arg2" you will have to use quotation marks to explain that to the shell:

Code:
command "arg1 arg2"

Here is your corrected script. Notice the differences (btw. i have shortened the superfluous pipeline into one sed invocation):

Code:
#!/bin/bash
 
. ~/.profile
 
date_var="$(date "+%d %h %Y")"
#date_var='01 Oct 2009'
time_stamp="$(tail -1 Interface.log | cut -f4 -d' ')"
end_string="$date_var $time_stamp"
sed -n '/^'"$date_var"'/,/^'"$end_string"'/ {;/^#/d;p;}' Interface.log  >> current_day_log.txt

I hope this helps.

bakunin
 

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LEARN ABOUT DEBIAN

gri_merge

GRI_MERGE(1)						      General Commands Manual						      GRI_MERGE(1)

NAME

       gri_merge - merge multiple Gri output files into a single PostScript file.

USAGE (style 1):
	      gri_merge [OPTIONS] CxR a.ps b.ps ... > merged_file.ps

       Merges  the  files  onto one page, in 'C' columns and 'R' rows.	The CxR files are given in the order of words on a page.  The page is pre-
       sumed to be 8.5x11in in size, as are all the input files, and the input files are sized to fit, and kept in natural scale.

USAGE (style 2):
	      gri_merge [OPTIONS] xcm ycm enlarge a.ps [b.ps ...] > merged_file.ps

       Where `enlarge' is a scale factor applied after offsetting `xcm' to the right and `ycm' upward.

   EXAMPLE (style 2):
	      The following

       gri_merge 2 12 .5 a.ps 

	      12 12 .5 b.ps 

	      2 2 .5 c.ps 

	      12 2 .5 d.ps > all.ps

       produces 4 panels from gri plots done using margins and sizes as specified in the following lines in a gri commandfile

	      set x margin 2

	      set x size 15

	      set y margin 2

	      set y size 15

       The OPTIONS, available if your 'perl' has 'getopts' library, are:

       -u graylevel -- set graylevel for underlay beneath panels, by default 0.75.

	      Values range from 0 (black) to 1 (white), although a value of precisely 1 means do NOT draw underlay.

       -b graylevel -- Set value for background under individual panels, again 0

	      for black to 1 for white, with 1 meaning no drawing.

       -h     -- Print this help message and quit.

SEE ALSO

       gri(1), gri_unpage(1)

gri_merge							       2009							      GRI_MERGE(1)
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