Remove Empty Lines From File in Linux

When working with file manipulation in Linux system, may needed to remove empty lines from a file to make it easier to read or to be processed further. This tutorial shows how to do that.

Create a new file for testing:

printf "Line1\n\nLine2\n\nLine3\n" > test.txt

The sed command can be used for files processing. Run the following command to remove empty lines from a file:

sed -i '/^$/d' test.txt

The -i option will edit file in-place.