mergefiles.sh

# unzip files
for filename in $(ls *.zip); do
  unzip $filename
done

# find paths of csv files and store as a variable
files=$(find . -name "*.csv")

# take header row from first file and write it to otput file
head -1./1/1.csv > output.csv # write header to file

for item in $files; do 
  tail -n +2 $item >> output.csv
done

echo "All lines have been combined in output.csv"