install Nginx

os：Ubuntu 18.04.3 LTS

# lsb_release -a

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LSB Version:	core-9.20170808ubuntu1-noarch:security-9.20170808ubuntu1-noarch
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.3 LTS
Release:	18.04
Codename:	bionic

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Use apt-get to install Nginx. The installer creates a systemd init script that runs Nginx as daemon on system startup. Follow the installation instructions for Ubuntu as follow:

sudo apt update
sudo apt install nginx

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output

Hit:1 http://archive.ubuntu.com/ubuntu bionic InRelease
Get:2 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Get:3 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]         
Get:4 http://archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]                     
Fetched 252 kB in 0s (531 kB/s)                                                                  
Reading package lists... Done
...
Setting up nginx-core (1.14.0-0ubuntu1.7) ...
Not attempting to start NGINX, port 80 is already in use.
Setting up nginx (1.14.0-0ubuntu1.7) ...

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nginx -v

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output

nginx version: nginx/1.14.0 (Ubuntu)
built with OpenSSL 1.1.1  11 Sep 2018
TLS SNI support enabled

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uninstall  Nginx on Ubuntu 18.04（aliyun）

step 1：

sudo apt-get remove nginx nginx-common # Removes all but config files.

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or

sudo apt-get purge nginx nginx-common # Removes everything

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step 2：

sudo apt-get autoremove # After using any of the above commands, use this in order to remove dependencies used by nginx which are no longer required.

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reinstall

To recreate it, first uninstall using purge to remove even configuration files and records:

# Run these commands as your normal login (e.g. "michael")
# Remove any existing versions of nginx
sudo apt-get remove '^nginx.*$'
 
# Setup a sources.list.d file for the nginx repository
cat << 'EOF' | sudo tee /etc/apt/sources.list.d/nginx.list
deb http://nginx.org/packages/ubuntu/ precise nginx
deb-src http://nginx.org/packages/ubuntu/ precise nginx
EOF
 
# Add nginx key
curl http://nginx.org/keys/nginx_signing.key | sudo apt-key add -
 
# install nginx
sudo apt-get update && sudo apt-get -y install nginx

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then reinstall:

apt-get install nginx

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Host ASP.NET Core on Linux with Nginx