If doing find and replace words in Windows is as easy as opening the file in a text editor and clicking ctrl+F or F5 button, In Linux, you can easily do it through its command line using SED command.

For example we have a file which looks like this.

 #cat edzofcit.txt
Hi, my name is Eddie. Eddie is my name. Edzofcit is my website. Eddie is my first name

The filename is edzofcit.txt and we want to change Eddie into Joseph. To change Eddie into Joseph, you can write these command below.

# sed -i -e "s/Eddie/Joseph/" edzofcit.txt

So if we show the edzofcit.txt file, it will now look like this.

#cat edzofcit.txt
Hi, my name is Joseph. Joseph is my name. Edzofcit is my website. Joseph is my first name

 Since the command has "/"  in it, you need specify an escape character "\\" before "/". Take a look below for example.

 # sed -i -e "s/Eddie/Joseph\\/Eddie/" edzofcit.txt

 We changed Eddie into Joseph/Eddie.

 #cat edzofcit.txt
Hi, my name is Joseph/Eddie. Joseph/Eddie is my name. Edzofcit is my website. Joseph/Eddie is my first name

That's all. With that code, you can now make a  powerfule script that can replace files all at once..

See you at the next tutorial. :)