Add new line character at the end of file in bash

Question

How can I use bash command line to add new line character at the end of file named file.txt. I tried use echo but it\'s not right. Can you show me how

Answer 1

Use Vi which automatically creates EOL at EOF on file save.

For example:

vi -escwq foo.txt

or:

ex -scwq foo.txt

To correct multiple files, check: How to fix 'No newline at end of file' for lots of files? at SO