root@squarekings-sim:/opt# apt-cache policy nginx
nginx:
  Installed: (none)
  Candidate: 1.6.3-1+trusty0
  Version table:
     1.6.3-1+trusty0 0
        500 http://ppa.launchpad.net/nginx/stable/ubuntu/ trusty/main amd64 Packages
     1.6.2-1+trusty0 0
        500 http://ppa.launchpad.net/nginx/stable/ubuntu/ trusty/main amd64 Packages
     1.4.6-1ubuntu3.2 0
        500 http://mirrors.digitalocean.com/ubuntu/ trusty-updates/main amd64 Packages
     1.4.6-1ubuntu3.1 0
        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
     1.4.6-1ubuntu3 0
        500 http://mirrors.digitalocean.com/ubuntu/ trusty/main amd64 Packages