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Sed Recipes


Recipes for GNU sed (stream editor), which is a non-interactive command-line text editor.

What is sed? #

GNU sed, or the stream editor, is a command-line text processing tool that operates on streams of text input. It reads text from a specified source, applies specified editing commands, and then outputs the modified text.

sed is a powerful and versatile tool for text manipulation in Unix-like environments. Check the GNU sed manual for detailed information.

Removing lines #

sed recipes for removing/deleting lines from a file following one or more expressions, invoked by the -e / --expression= operator.

sed does not remove the lines from the source file by default. Use the -i option with the sed command to work on the source file. Alternatively, use redirection to save the output to a new file, e.g. sed '1d' file > newfile.

Delete empty lines or blank lines:

$ sed '/^$/d' file

Delete lines that begin with a specified character, in this case “a”:

$ sed '/^a/d' file

Delete lines that end with a specified character, in this case “a”:

$ sed '/a$/d' file

Delete lines where contents are written in upper case or capital letters:

$ sed '/^[A-Z]*$/d' file

Delete lines that contain the pattern “foobar”:

$ sed '/foobar/d' file

Delete lines starting from a pattern till the last line

$ sed '/foobar/,$d' file

Further readings #

Sources and recommended, further resources on the topic:


Jonas Jared Jacek • J15k

Jonas Jared Jacek (J15k)

Jonas works as project manager, web designer, and web developer since 2001. On top of that, he is a Linux system administrator with a broad interest in things related to programming, architecture, and design. See:


License: Sed Recipes by Jonas Jared Jacek is licensed under CC BY-SA 4.0.

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