[email protected]:~/test# echo "test 1" >> a.txt [email protected]:~/test# echo "test 2" >> b.txt [email protected]:~/test# echo "test 3" >> c.txt [email protected]:~/test# echo "nothing" >> d.txt [email protected]:~/test# ls a.txt b.txt c.txt d.txt [email protected]:~/test# grep . *.txt | grep test a.txt:test 1 b.txt:test 2 c.txt:test 3