How to replace text
sudo sed -i "s'fastcgi_pass php5-fpm;'fastcgi_pass php;'" /etc/nginx/sites-enabled/*
sed -i 's/UNIX/Linux/g' input.file
#!/bin/bash
for f in /path/to/*.doc
do
sed -i 's/UNIX/Linux/g' "$f"
done
find . -type f -print0 | xargs -0 sed -i 's/Application/whatever/g'