#!/bin/sh /bin/rm -f testdata.dat for file in behind/2006/EVP_behind_2006_34*_rates.txt \ behind/2006/EVP_behind_2006_35*_rates.txt \ behind/2006/EVP_behind_2006_36*_rates.txt \ behind/2007/EVP_behind_2007_00*_rates.txt do behead $file | gawk '{$3=" "; $4=" "; $5=" "; print}' >> testdata.dat done