In this article, you have learned what SED is, how SED works, how to replace a string in a file, how to replace a variable in a file, and how to perform the deletion. To learn more about Linux, follow ...

On the other hand, in the Insert mode, file editing is done. Here, the text is inserted into the file. So, you need to be in the insert mode to enter text. Just type ‘ i ’ to be in the insert mode.

If you're new to Linux, there's a very handy file you'll want to learn about right away. Jack Wallen introduces you to the hosts file and how to add entries to it.