Can I use grep to find & replace text?

[jim.thornton]

Hello,

I have just changed a setting and I need to go through about 30 files within a directory and find all instances of a word, and change it to another word.

My intial though was GREP was the tool to use, however, I looked in the man pages and I can't find a "find & replace" option within it.

Is there a way that I can use grep to look into every file within the directory and change the word?

any help is greatly appreciated.

[smolloy]

Sed might be what you need

 sed 's/word1/word2/' yourfile.txt

That will replace all occurences of word1 with word2 inside yourfile.txt.

[khafa]

and dont forget the -i and g options for sed.
see the man page

man sed