root@flynx:~/test# echo "test 1" >> a.txt root@flynx:~/test# echo "test 2" >> b.txt root@flynx:~/test# echo "test 3" >> c.txt root@flynx:~/test# echo "nothing" >> d.txt root@flynx:~/test# ls a.txt b.txt c.txt d.txt root@flynx:~/test# grep . *.txt | grep test a.txt:test 1 b.txt:test 2 c.txt:test 3