I've installed nginx 1.2.3 by adding a new ppa sudo add-apt-repository ppa:nginx/stable sudo apt-get update sudo apt-get install nginx However, nginx -v still gives me 1.1.19. What happened? Output The following packages will be upgraded: nginx 1 upgraded, 0 newly installed, 0 to remove and 46 not upgraded. Need to get 61.8 kB of archives. After this operation, 3,072 B of additional disk space will be used. Get:1 http://ppa.launchpad.net/nginx/stable/ubuntu/ precise/main nginx all 1.2.3-0ubuntu0ppa3~precise [61.8 kB] Fetched 61.8 kB in 0s (89.7 kB/s) (Reading database ... 79914 files and directories currently installed.) Preparing to replace nginx 1.1.19-1 (using .../nginx_1.2.3-0ubuntu0ppa3~precise_all.deb) ... Unpacking replacement nginx ... Setting up nginx (1.2.3-0ubuntu0ppa3~precise) ... root@precise64:/var/www/apadment# nginx -v nginx version: nginx/1.1.19