Is there a command to show the directory/file name when cat files?
For example: assume two files f1.txt and f2.txt are under ./tmp
Then when I do cat ./tmp/*.txt, only the content of files will be shown. But how to firstly show the file name, then the content?, e.g.:
(The needed command): ./tmp/f1.txt: This is from f1.txt and so on ./tmp/f1.txt: This is from f2.txt ...
Is there a command to do it? (There seems to be no option for 'cat' to show the file names)