Using sed to extract line of a file Post: 303034898

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I have a shell script and want to assign a value to a variable. The value is the line exctrated from a file using the line number. The line number it is not fix, and could change any time. I have tried sed, awk, head .. See my script # Get randome line number from the file #selectedline = `awk...

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Hi, how can i extract file extension using sed? for e.g., if a file name is abc.txt then how can i get "txt" (after .) Thanks praveen

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extract a line from a file using the line number

Hello, I am having trouble extracting a specific line from a file when the line number is known. My first attempt involved grep -n 'hi' (the word 'hi will always be there) to get the line number before the line that I actually want (line 4). Extra Notes: -I am working in a bash script. -The...

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This is the line that I am using: sed 's/^*${3}*$$/\1 /' <test.txt >results.txt and suppose that test.txt contains the following lines: http://www.example.com/200904/AUS.txt http://www.example.com/200903/_RUS.txt http://www.example.com/200902/.FRA.txt What I expected to see in results.txt...

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Dear all, I am trying to extract a number from a line in one file (task 1), duplicate another file (task 2) and replace all instances of the strings 300, in duplicated with the extracted number (task 3). Here is what I have tried so far: for ((k=1;k<4;k++)); do temp=`sed -n "${k}p"...

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Hi guys, does anyone know how to extract(grep) a line from the file, if I know the line number? Thanks a lot.

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Hi guys, I have been trying to do this, but... no luck so maybe you can help me. I have a line like this: Total Handled, Received, on queue Input Mgs: 140 / 14 => 0 I need to, get the number after the / until the =, to get only 14 . Any help is greatly appreciated. Thanks,

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Perl to extract information from a file line by line

In the below perl code I am using tags within each line to extract certain information. The tags that are used are: STB >0.8 is STRAND BIAS otherwise GOOD FDP is the second number GO towards the end of the line is read into an array and the value returned is outputed, in the first line that...

LEARN ABOUT DEBIAN

guess-helper

guess-helper(8) 						   NVRAM WakeUp 						   guess-helper(8)

NAME

       guess-helper - Tries  to  guess	the configuration by comparing four dumps of the NVRAM.

SYNOPSIS

       guess-helper

DESCRIPTION

       guess-helper  is  a helper program from the package nvram-wakeup.  It will guide you through the procedure of creating the files needed for
       the program guess and  eventually will run guess at the end. The output will be a configuration file which might even work ;-) Don't change
       any other BIOS settings you are not told to change until the procedure is finished.

       See README.mb for more details.

SEE ALSO

       nvram-wakeup(8), guess(8), README.mb

HOMEPAGE

       http://sf.net/projects/nvram-wakeup/

AUTHOR

       Written by Sergei Haller <Sergei.Haller@math.uni-giessen.de>.

REPORTING BUGS

       Report bugs at the bug tracking system (see HOMEPAGE) or on the mailing list nvram-wakeup-devel@lists.sourceforge.net

COPYRIGHT

       Copyright (C) 2001-2004 Sergei Haller.

       This  program  is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
       the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY	WARRANTY;  without  even  the  implied	warranty  of  MER-
       CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You  should  have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation,
       Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

Linux								    Jul 07 2004 						   guess-helper(8)

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1. Shell Programming and Scripting

Extract a line from a file using the line number

Discussion started by: zambo

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extract a line from a file using the line number

Discussion started by: grandtheftander

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Using sed to extract a substring at end of line

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