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Insert content of a file to another file at a line number which is given by third file

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# 1  
Old 09-29-2016
Linux Insert content of a file to another file at a line number which is given by third file
Hi friends, here is my problem.

I have three files like this..

cat file1.txt
=======
Code:
unix is best 
unix is best 
linux is best
unix is best
linux is best
linux is best
unix is best
unix is best

cat file2.txt
========
Code:
Windows performs better
Mac OS performs better
Windows performs better
Mac OS performs better

cat file3.txt
==========
Code:
6

I want to insert content of file2.txt into a file1.txt at a linenumber given by file3.txt.. Smilie

OUTPUT should be
=============
Code:
unix is best 
unix is best 
linux is best
unix is best
linux is best
Windows performs better
Mac OS performs better
Windows performs better
Mac OS performs better
linux is best
unix is best
unix is best

can you please suggest me one liner shell command to achieve above task..



Moderator's Comments:
Mod Comment Please use CODE tags as required by forum rules!
Last edited by RudiC; 09-29-2016 at 06:34 AM.. Reason: Added CODE tags.
# 2  
Old 09-29-2016
Hi,
under linux and shell bash:
Code:
$ sed -e "$((`<file3.txt` -1))rfile2.txt" file1.txt
unix is best
unix is best
linux is best
unix is best
linux is best
Windows performs better
Mac OS performs better
Windows performs better
Mac OS performs better
linux is best
unix is best
unix is best

Regards.
These 2 Users Gave Thanks to disedorgue For This Post:
Jagadeesh Kumar rbatte1
# 3  
Old 09-29-2016
Hello Jagadeesh Kumar,

Welcome to forums, please use code tags as per forum rules for your codes/Inputs/commands which you are using into your posts. Following may help you in same.
Code:
awk -vval=`cat Input_file3.txt` 'NR==val{system("cat Input_file2.txt");} 1'  Input_file1.txt

Output will be as follows.
Code:
unix is best
unix is best
linux is best
unix is best
linux is best
Windows performs better
Mac OS performs better
Windows performs better
Mac OS performs better
linux is best
unix is best
unix is best

Thanks,
R. Singh
These 2 Users Gave Thanks to RavinderSingh13 For This Post:
Jagadeesh Kumar rbatte1
# 4  
Old 09-29-2016
Try also
Code:
awk 'NR == 1 {LC = $0; next} FNR == LC {while (0 < getline X < FI) print X} 1' file3 FI="file2" file1
unix is best 
unix is best 
linux is best
unix is best
linux is best
Windows performs better
Mac OS performs better
Windows performs better
Mac OS performs better
linux is best
unix is best
unix is best

These 2 Users Gave Thanks to RudiC For This Post:
Jagadeesh Kumar rbatte1
# 5  
Old 09-29-2016
With a recent shell, try
Code:
sed "$(($(cat file3)-1))rfile2"  file1

This User Gave Thanks to RudiC For This Post:
Jagadeesh Kumar
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