What is the method of removing blank lines by Shell?

The main content of this article is to explain "what are the methods of removing blank lines by Shell". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Next, let the editor take you to learn "where is the Shell method to remove blank lines?"

Sometimes we often have a lot of blank lines when processing and viewing files, and it is necessary to remove these lines for the sake of beauty or when necessary, as follows:

1) use the tr command

The code is as follows:

Cat file name | tr-s'\ n'

2) use the sed command

The code is as follows:

Cat file name | sed'/ ^ $/ d'

3) use the awk command

The code is as follows:

Cat file name | awk'{if ($0,000,") print}'

Cat file name | awk'{if (length! = 0) print $0}'

4) use the grep command

The code is as follows:

Grep-v "^ $" file name

At this point, I believe you have a deeper understanding of the "Shell method to remove blank lines". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!