Upgrade Nginx Latest Version

sudo nano /etc/apt/sources.list



Add the following in the file:

# Nginx upgrades

deb http://nginx.org/packages/ubuntu/ precise nginx
deb-src http://nginx.org/packages/ubuntu/ precise nginx



Now remove the old version on your server:

sudo apt-get clean

sudo apt-get remove nginx-*



Get the signing key

wget http://nginx.org/packages/keys/nginx_signing.key

cat nginx_signing.key | sudo apt-key add -



And install the latest stable release, hit enter for the default which is to keep your nginx.conf and not install a new one.

sudo apt-get update

sudo apt-get upgrade

sudo apt-get install nginx



This will remove the old version but keep all your config and vhost files intact, install the latest stable release all without a seconds downtime



Now restart nginx

sudo service nginx restart



Enjoy!