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+[#]: collector: (lujun9972)
+[#]: translator: ( )
+[#]: reviewer: ( )
+[#]: publisher: ( )
+[#]: url: ( )
+[#]: subject: (How To Remove/Delete The Empty Lines In A File In Linux)
+[#]: via: (https://www.2daygeek.com/remove-delete-empty-lines-in-a-file-in-linux/)
+[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/)
+
+How To Remove/Delete The Empty Lines In A File In Linux
+======
+
+Some times you may wants to remove or delete the empty lines in a file in Linux.
+
+If so, you can use the one of the below method to achieve it.
+
+It can be done in many ways but i have listed simple methods in the article.
+
+You may aware of that grep, awk and sed commands are specialized for textual data manipulation.
+
+Navigate to the following URL, if you would like to read more about these kind of topics. For **[creating a file in specific size in Linux][1]** multiple ways, for **[creating a file in Linux][2]** multiple ways and for **[removing a matching string from a file in Linux][3]**.
+
+These are fall in advanced commands category because these are used in most of the shell script to do required things.
+
+It can be done using the following 5 methods.
+
+  * **`sed Command:`** Stream editor for filtering and transforming text.
+  * **`grep Command:`** Print lines that match patterns.
+  * **`cat Command:`** It concatenate files and print on the standard output.
+  * **`tr Command:`** Translate or delete characters.
+  * **`awk Command:`** The awk utility shall execute programs written in the awk programming language, which is specialized for textual data manipulation.
+  * **`perl Command:`** Perl is a programming language specially designed for text editing.
+
+
+
+To test this, i had already created the file called `2daygeek.txt` with some texts and empty lines. The details are below.
+
+```
+$ cat 2daygeek.txt
+2daygeek.com is a best Linux blog to learn Linux.
+
+It's FIVE years old blog.
+
+This website is maintained by Magesh M, it's licensed under CC BY-NC 4.0.
+
+He got two GIRL babys.
+
+Her names are Tanisha & Renusha.
+```
+
+Now everything is ready and i’m going to test this in multiple ways.
+
+### How To Remove/Delete The Empty Lines In A File In Linux Using sed Command?
+
+Sed is a stream editor. A stream editor is used to perform basic text transformations on an input stream (a file or input from a pipeline).
+
+```
+$ sed '/^$/d' 2daygeek.txt
+2daygeek.com is a best Linux blog to learn Linux.
+It's FIVE years old blog.
+This website is maintained by Magesh M, it's licensed under CC BY-NC 4.0.
+He got two GIRL babes.
+Her names are Tanisha & Renusha.
+```
+
+Details are follow:
+
+  * **`sed:`** It’s a command
+  * **`//:`** It holds the searching string.
+  * **`^:`** Matches start of string.
+  * **`$:`** Matches end of string.
+  * **`d:`** Delete the matched string.
+  * **`2daygeek.txt:`** Source file name.
+
+
+
+### How To Remove/Delete The Empty Lines In A File In Linux Using grep Command?
+
+grep searches for PATTERNS in each FILE. PATTERNS is one or patterns separated by newline characters, and grep prints each line that matches a pattern.
+
+```
+$ grep . 2daygeek.txt
+or
+$ grep -Ev "^$" 2daygeek.txt
+or
+$ grep -v -e '^$' 2daygeek.txt
+2daygeek.com is a best Linux blog to learn Linux.
+It's FIVE years old blog.
+This website is maintained by Magesh M, it's licensed under CC BY-NC 4.0.
+He got two GIRL babes.
+Her names are Tanisha & Renusha.
+```
+
+Details are follow:
+
+  * **`grep:`** It’s a command
+  * **`.:`** Replaces any character.
+  * **`^:`** matches start of string.
+  * **`$:`** matches end of string.
+  * **`E:`** For extended regular expressions pattern matching.
+  * **`e:`** For regular expressions pattern matching.
+  * **`v:`** To select non-matching lines from the file.
+  * **`2daygeek.txt:`** Source file name.
+
+
+
+### How To Remove/Delete The Empty Lines In A File In Linux Using awk Command?
+
+The awk utility shall execute programs written in the awk programming language, which is specialized for textual data manipulation. An awk program is a sequence of patterns and corresponding actions.
+
+```
+$ awk NF 2daygeek.txt
+or
+$ awk '!/^$/' 2daygeek.txt
+or
+$ awk '/./' 2daygeek.txt
+2daygeek.com is a best Linux blog to learn Linux.
+It's FIVE years old blog.
+This website is maintained by Magesh M, it's licensed under CC BY-NC 4.0.
+He got two GIRL babes.
+Her names are Tanisha & Renusha.
+```
+
+Details are follow:
+
+  * **`awk:`** It’s a command
+  * **`//:`** It holds the searching string.
+  * **`^:`** matches start of string.
+  * **`$:`** matches end of string.
+  * **`.:`** Replaces any character.
+  * **`!:`** Delete the matched string.
+  * **`2daygeek.txt:`** Source file name.
+
+
+
+### How To Delete The Empty Lines In A File In Linux using Combination of cat And tr Command?
+
+cat stands for concatenate. It is very frequently used in Linux to reads data from a file.
+
+cat is one of the most frequently used commands on Unix-like operating systems. It’s offer three functions which is related to text file such as display content of a file, combine multiple files into the single output and create a new file.
+
+Translate, squeeze, and/or delete characters from standard input, writing to standard output.
+
+```
+$ cat 2daygeek.txt | tr -s '\n'
+2daygeek.com is a best Linux blog to learn Linux.
+It's FIVE years old blog.
+This website is maintained by Magesh M, it's licensed under CC BY-NC 4.0.
+He got two GIRL babes.
+Her names are Tanisha & Renusha.
+```
+
+Details are follow:
+
+  * **`cat:`** It’s a command
+  * **`tr:`** It’s a command
+  * **`|:`** Pipe symbol. It pass first command output as a input to another command.
+  * **`s:`** Replace each sequence of a repeated character that is listed in the last specified SET.
+  * **`\n:`** To add a new line.
+  * **`2daygeek.txt:`** Source file name.
+
+
+
+### How To Remove/Delete The Empty Lines In A File In Linux Using perl Command?
+
+Perl stands in for “Practical Extraction and Reporting Language”. Perl is a programming language specially designed for text editing. It is now widely used for a variety of purposes including Linux system administration, network programming, web development, etc.
+
+```
+$ perl -ne 'print if /\S/' 2daygeek.txt
+2daygeek.com is a best Linux blog to learn Linux.
+It's FIVE years old blog.
+This website is maintained by Magesh M, it's licensed under CC BY-NC 4.0.
+He got two GIRL babes.
+Her names are Tanisha & Renusha.
+```
+
+--------------------------------------------------------------------------------
+
+via: https://www.2daygeek.com/remove-delete-empty-lines-in-a-file-in-linux/
+
+作者：[Magesh Maruthamuthu][a]
+选题：[lujun9972][b]
+译者：[译者ID](https://github.com/译者ID)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]: https://www.2daygeek.com/author/magesh/
+[b]: https://github.com/lujun9972
+[1]: https://www.2daygeek.com/create-a-file-in-specific-certain-size-linux/
+[2]: https://www.2daygeek.com/linux-command-to-create-a-file/
+[3]: https://www.2daygeek.com/empty-a-file-delete-contents-lines-from-a-file-remove-matching-string-from-a-file-remove-empty-blank-lines-from-a-file/