Find and replace in Unix Using SED
Common Find and Replace Commands:
sed 's/find/replace/' filename
To replace all search terms
sed 's/find/replace/g' filename
To replace without case sensitive
sed 's/find/replace/gi' filename
To replace withing a range
sed '1,/search-term/s/find/replace/gi' filename
This command will help to find and replace string in a file. You can find and replace multiple files using SED.