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Top Forums Shell Programming and Scripting How to replace a string in a file with contents of another file? Post 302908238 by SriniShoo on Friday 4th of July 2014 10:44:33 PM
Old 07-04-2014
Code:
awk 'NR == FNR {a[FNR] = $0; n++; next}
  /LineToBeReplaced/ {for(i = 1; i <= n; i++) {print a[i]}; next}1' file2.txt file1.txt

---------- Post updated at 10:44 PM ---------- Previous update was at 10:43 PM ----------

Below is the run output
Code:
Srinivas@Snow ~/download/log$ cat file2.txt
This is line1 of the second file.
This is line2 of the second file.
This is line3 of the second file.
This is line4 of the second file.
This is line5 of the second file.
Srinivas@Snow ~/download/log$ cat file1.txt
This is the first file.
LineToBeReplaced
This is the last line of the first file.
Srinivas@Snow ~/download/log$ awk 'NR == FNR {a[FNR] = $0; n++; next}
  /LineToBeReplaced/ {for(i = 1; i <= n; i++) {print a[i]}; next}1' file2.txt file1.txt
This is the first file.
This is line1 of the second file.
This is line2 of the second file.
This is line3 of the second file.
This is line4 of the second file.
This is line5 of the second file.
This is the last line of the first file.
Srinivas@Snow ~/download/log$

 

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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). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWgawk | +--------------------+-----------------+ |Interface Stability | Volatile | +--------------------+-----------------+ NOTES
Source for gawk is available on http://opensolaris.org. Free Software Foundation Nov 3 1999 IGAWK(1)
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