if you upgrading to ubuntu 16

dpkg: error processing archive /var/cache/apt/archives/nginx-extras_1%3a1.10.1-8.5.0.29~trusty1_amd64.deb (–unpack): trying to overwrite ‘/usr/sbin/nginx’, which is also in package nginx 1.11.2-1~trusty dpkg-deb: subprocess paste killed by signal (Broken pipe)

sudo apt-get install -f

sudo dpkg -i –force overwrite /var/cache/apt/archives/nginx-common_1%3a1.10.1-8.5.0.29~trusty1_all.deb