Question

I need to recursively merge all csv files under a root directory(arbitrary hierarchy), the csv files might not have a line break at the very end, so I would like to add a new line whenever I merge two files.
how do I do this in shellscript?

Answer 1

Use find with two -exec options:

find $YOUR_DIR -iname '*.csv' -exec cat {} \; -exec echo \;

Edit: also, maybe if your CSVs have a header, instead of cat, you may use sed 1d to supress the first line:

find $YOUR_DIR -iname '*.csv' -exec sed 1d {} \; -exec echo \;