Currently I only have this solution for a single file:

perl -pe '$_.="\n"' file1.txt > file1.new

It's untested but should read file1.txt and print the modified version into file1.new.

I have no idea, how to perform this with multiple files in one (simple) command.

You could still use a shell for loop to perform this upon several files...

# bash
for FILE in *.txt; do perl -pe '$_.="\n"' $FILE > $FILE.new; done

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In reply to Re^3: IO::Handles ... any good? by linuxer
in thread IO::Handles ... any good? by blowupp

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