We may want to uninstall and then re-install nginx if any problems occur. First, un-install with code below, then if using a custom nginx, re-install by following the ‘Install Nginx’ steps here – WordPress Install (Single Site) – Ubuntu 16.04, NGINX, PHP7
Backup all nginx config files at ‘/etc/nginx’ before doing any of this!
Removes all but config files:
$ sudo apt-get remove nginx nginx-common
or remove everything:
$ sudo apt-get purge nginx nginx-common
After using any of the above commands, use this in order to remove dependencies used by nginx which are no longer required:
$ sudo apt-get autoremove