When editing a large file with a common word that needs to be replaced throughout the entirety of the script try using the search and replace feature in vi

To perform a global search and replace, use the search and replace command in command mode:

  :%s/search_string/replacement_string/g

The % is a shortcut that tells vi to search all lines of the file for search_string and what to change it to as listed here in replacement_string. The global (g) flag at the end of the command tells vi to continue searching for other occurrences of search_string.

Thank me later, I just edited a 300 line configuration for NGINX Reverse Proxy to a large complex application environment. Seek and destroy!