Opening a file into editor take too much resource of system or server. So I come up with the very easy and useful way to replace content into large file using linux command like.
Here I am taking an example of
MySql file which having
*.sql as file extension
sed -i '' 's/utf8mb4_0900_ai_ci/utf8mb4_unicode_ci/g'
sed -i 's/utf8mb4_0900_ai_ci/utf8mb4_unicode_ci/g'