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Full Discussion: Search for a string at a particular position and replace with blank based on position
Top Forums Shell Programming and Scripting Search for a string at a particular position and replace with blank based on position Post 302954541 by Aia on Tuesday 8th of September 2015 11:32:25 PM
Old 09-09-2015
Quote:
Originally Posted by Pradhikshan
Hi,

I have a file with multiple lines(fixed width dat file). I want to search for '02' in the positions 45-46 and if available, in that lines, I need to replace value in position 359 with blank. As I am new to unix, I am not able to figure out how to do this. Can you please help me to achieve this?
Do you have Perl?
Try:

Code:
perl -ple 'substr $_, 358, 1," " if (substr $_, 44, 2) == "02";' Pradhikshan.file

I am assuming when you mention positions you're starting counting at 1, which is 0 for Perl.

perl -ple: # invoke the perl command at the command line with automatic printing of each line
substr $_, 358, 1," ": # replace the 359th character with blank (starts counting at 0) [if ...]
if (substr $_, 44, 2) == "02": # ... if characters 45th and 46th make the string 02; (starting at 45th position take 2 characters).
Last edited by Aia; 09-09-2015 at 12:40 AM..
 

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set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
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