Unix Find and Replace

Find and replace particular text from script .
This is useful in any install shell scripts which need paths in LDT to be changed based on instance 

mv testfindrep.sh testfindrep.old
sed 's/ebstdev/ebstst1/g' testfindrep.old > testfindrep.sh

Here
s means substitute
ebstdev expr to find
ebstst1 expr to replace with

g means globally - find all

> redirects output to the file