How to replace one string to another string by using unix

[A_SUSHMA]

Hi..,

I want to replace one string to another string by using unix

1.by using vi editor
2.with out using vi editor

for ex:
I/p is like
---------------
sushma is reading books,sushma is watching movie,sushma is cooking....

o/p is:
---------
bargavi is reading books,bargavi is watching movie,bargavi is cooking.


i want

[jerome_rajan]

1. Using vi editor
A. :s/search_string/replacement_string/g

2. Without using vi editor.
A. sed s/search_string/replacement_string/g <filename>

[prasson_ibm]

1. Using vi editor

Code: Select all

s1,$/sushma/bargavi/g 

2. Without using vi editor.

Code: Select all

sed 's/sushma/bargavi/g' <Input file Name > Output file Name