Add new line character at the end of file in bash

bash file command newline

echo "" >> file.txt

Adds a newline character at the end

bash file command newline

With sed:

sed -i '' -e '$a\' file.txt

with echo:

echo  >> file.txt

bash file command newline

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

For example:

vi -escwq foo.txt

or:

ex -scwq foo.txt

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