csvcat man page
csvcat — Efficiently concatenate CSV
csvcat file1 file2 [...] > concatenated.csv
Efficiently concatenate CSVs (or other tabular text files), stripping extra header lines. So far, is the fastest non-compiled script I've been able to devise. Plenty open to improvements and suggestions.
William Moreno Reyes - This manpage waw written for the Fedora Project but can be used in others projects under a CC-By license.