In this example, fruit.txt in the home directory is the target. sed -i 's/apple/orange/g'įinally, tell sed what file the text is in that needs replacing. Note: if you do not want to replace every text in the file (apples to oranges, for example), remove the g and have it run as sed -i 's/apples/oranges/' instead. The g/ tells sed to replace all text instances (apples) with the new text (oranges). Once the text we want to replace is written into the command (oranges), close off the command with g/. In this example, we’ll replace “apples” with “oranges.” sed -i 's/apples/oranges When the text we want to replace is written into the command, the next step is to write in the new text that will replace it. In this example, we’ll replace the word “apple.” sed -i 's/apple Now that the s/ is written into the terminal command-line prompt, it is time to tell sed what text to replace in the file.

The s/ goes directly before the existing text you wish to replace using sed. sed -i 'įollowing the first ‘ mark, write s/. This quotation mark is essential, as all text being replaced with sed -i needs to start after this mark. sed -iĪfter writing out the sed -i command, add in a ‘ quote mark. This is the start of the replacement command. Once the terminal window is open and ready to use, write out sed -i in the terminal prompt. You can open up a terminal window by pressing Ctrl + Alt + T on the keyboard. First, open up a terminal window on the Linux desktop. Replacing a text string in a file with Sed is done with the sed -i command. Sed is usually pre-installed on 99% of Linux operating systems, so there’s no need to install it to use it. The reason? It’s straightforward to use and does its job very well. The sed tool is the best way to replace a text string in a file on Linux. If you’re new to Linux and don’t know how to do it, we can help! Follow along as we show you how to replace a text string in a file on Linux! That’s why it’s good to know how to replace text strings in files using the command line quickly. Editing text files on Linux by hand can be tedious.

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