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Top Forums Shell Programming and Scripting Replace a space with underscore in a file Post 303023616 by Scott on Thursday 20th of September 2018 04:13:56 AM
Old 09-20-2018
There is (as is always the case) a number of ways of doing this. Here's one with awk:
Code:
awk -F'"' '/EqName/ { sub(" ", "_", $2) }1' file
{
EqName         Tan_1
....
....
}

{

EqName         Sin_2
...
...
}

And one way with sed:
Code:
sed -i '/EqName/{s/\(.*\) /\1_/}' file


Last edited by Scott; 09-20-2018 at 05:27 AM.. Reason: Added sed
This User Gave Thanks to Scott For This Post:
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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