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linuxunixcat

Concatenating Files And Insert New Line In Between Files

I have multiple files which I want to concat with cat. Let's say 

File1.txt 
foo

File2.txt
bar

File3.txt
qux

I want to concat so that the final file looks like:

foo

bar

qux

Instead of this with usual cat File*.txt > finalfile.txt 

foo
bar 
qux

What's the right way to do it?

Solution

  • You can do:

    for f in *.txt; do (cat "${f}"; echo) >> finalfile.txt; done

    Make sure the file finalfile.txt does not exist before you run the above command.

    If you are allowed to use awk you can do:

    awk 'FNR==1{print ""}1' *.txt > finalfile.txt