Add String to Each Line in Bash: Linux File Editing Made Easy

If you're a Linux user, you're probably familiar with Bash, the command-line shell that allows you to interact with your system. One common task you may need to do is add a specific string to the beginning or end of each line in a file. Fortunately, Bash has a built-in tool that makes this task easy.

To add a string to each line in a file, you can use the sed command. The sed command is a stream editor that can perform various text transformations, including adding text to the beginning or end of each line.

To add a string to the beginning of each line in a file, you can use the following command:

sed -i 's/^/your_string_here/' file_name_here

In this command, the -i option tells sed to edit the file in place, meaning it will modify the file directly. The 's/^/your_string_here/' part of the command is a sed substitute command that tells sed to find the beginning of each line (^) and replace it with your desired string. Finally, file_name_here is the name of the file you want to edit.

To add a string to the end of each line in a file, you can use the following command:

sed -i 's/$/your_string_here/' file_name_here

In this command, the only difference is that we're using the end of line anchor ($) instead of the beginning of line anchor.

Using the sed command in Bash, adding a string to each line in a file is a breeze. Whether you need to add a prefix or suffix to each line, sed has got you covered.