Other sed commands

sed offers a lot of commands that can be used to insert, change, delete, and transform text with ease. Let's see some examples of how to use these commands with sed.

The delete command

You can use the delete command d to delete lines or a range of lines from your stream. The following command will delete the third line from the stream: 

$ sed '3d' myfile

The following command will delete the third to the fifth line from the stream:

$ sed '3,5d' myfile

 This command will delete from the fourth line to the end of the file:

$ sed '4,$d' myfile

Note that the deletion happens only to the stream, not the actual file. So if you want to delete from the actual file, you can use the -i option:

$ sed -i '2d' myfile #Permenantly delete the second line from the file

The insert and append commands

The insert, i, and append, a, commands work the same way with just a slight difference.

The insert command inserts the specified text before the specified line or pattern.

The append command inserts the...