View Full Version : Linux command to replace strings in a line of text?

January 13th, 2007, 12:55 AM
I need to be able to replace certain strings in a line of text, and echo it back out to the screen, for a shell script that I'm working on.

Basically, I need something similar to PHP's str_replace(); something that will give this type of effect:
ubuntu:~$[command name] --replace "Hello, this is a line of text." "Hello" "Goodbye"
Goodbye, this is a line of text.

Any simple way to do this? :)

January 13th, 2007, 01:21 AM
What you want to use is sed, http://www.grymoire.com/Unix/Sed.html this tutorial should show you what you need.
To change hello to goodbye it would look something like

sed 's/hello/goodbye/g'

January 13th, 2007, 01:24 AM
I'm not sure I have correctly understood what you need, but in case I understood correctly, here is a possible solution
echo "Hello, this is a line of text."|sed -e 's/Hello/Goodbye/'
Goodbye, this is a line of text.
Hope this helps.