How to Replace a Variable in a File Using SED Let’s learn how to replace a variable using SED, now. In this way, you can replace a string using the SED command. You’ll see “Channel” has been replaced with “Family”.

So, go to the next line, and type: sed -i 's/Channel/Family/g' file.txtĪfter running the command, to view the file again, type: cat file.txt Press enter, then type: Welcome to Linux Channel How can we do that?įirst, write the below-given command in the terminal to create the file. Now, we want to replace “Channel” with “Family”. Suppose, we have a random text “Welcome to Linux Channel” in a text file called “file.txt”. Here’s a quick example to clear the concept. Then, provide the file name in the place of “file_name” from where the old string will be found and replaced. Of course, the old string name needs to be entered as well. In the syntax, you only need to provide a suitable “new string” name that you want to be placed with the “old string”. So the syntax is: sed -i 's/old-string/new-string/g' file_name How SED Works This will help understand the command better. Here we’ll see the syntax of SED used in a simple string replacement. SED is also capable of performing complex pattern matching. You can modify the files as per your requirements without having to open them. It can be used to do find and replace, insertion, and delete operations in Linux. With the help of SED, coders can edit files without even opening them.

In the Linux world, SED is mainly popular for its find and replace functionality. It performs searching, insertion, find and replace, deletion. SED command in Linux stands for Stream Editor. If you’re looking for that, you can directly jump onto that, and skip the rest. This will come after the variable value replacement part. I’ll also show how to perform delete operations using SED. Before replacing a variable in a file using SED, you need to understand what SED is, the syntax of SED, and how SED works. This article will give you an overview of replacing a variable value in a file using SED. Want to know the tricks of replacing a variable in a file using the SED command?

Sed find word in file