bash files loop example

forfile-in-grep-echo.sh

#!/bin/bash
for file in /etc/*
do
	if [ "${file}" == "/etc/resolv.conf" ]
	then
		countNameservers=$(grep -c nameserver /etc/resolv.conf)
		echo "Total  ${countNameservers} nameservers defined in ${file}"
		break
	fi
done

//more stack-o answers for cat'ing  file names and contents

//This should do the trick:

for filename in file1.txt file2.txt file3.txt; do
    echo "$filename"
    cat "$filename"
done > output.txt

//or to do this for all text files recursively:

find . -type f -name '*.txt' -print | while read filename; do
    echo "$filename"
    cat "$filename"
done > output.txt

  		
//didn't work. I just wrote some really ugly awk code:
	
for i in $listoffiles do awk '{print FILENAME,$0,$1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11}' $i >> concat.txt done
//– Nick May 6 '11 at 22:13 
  		
//...care to elaborate? That's about as simple as bash code gets. – Chris May 6 '11 at 22:14
//@Nick: your awk line shouldn't even work, considering that $0 is the entire line, so you've actually got repeating columns in there... – Chris May 6 '11 at 22:20
//@Chris You're so totally right. – Nick May 6 '11 at 22:26
//@Nick: Nifty solution otherwise :) – Chris May 6 '11 at 22:27