How can I append a # in front of each line of a block of text?

This is part of my PHP Myadmin's configuration file: Alias /phpMyAdmin /usr/share/phpMyAdmin Alias /phpmyadmin /usr/share/phpMyAdmin AddDefaultCharset UTF-8 # Apache 2.4 Require ip 127.0.0.1 Require ip ::1 # Apache 2.2 Order Deny,Allow Deny from All Allow from 127.0.0.1 Allow from ::1 # Apache 2.4 I want to add # in front of each line starting from the first ` and until `. How can I do this?