Install Nginx on Linux

http://nginx.org/en/linux_packages.html#mainline

For Debian/Ubuntu, in order to authenticate the nginx repository signature and to eliminate warnings about missing PGP key during installation of the nginx package, it is necessary to add the key used to sign the nginx packages and repository to the apt program keyring. Please download this key from our web site, and add it to the apt program keyring with the following command:

sudo apt-key add nginx_signing.key

For Ubuntu replace codename with Ubuntu distribution codename, and append the following to the end of the /etc/apt/sources.list file:

codename
Ubuntu:

Version	Codename	Supported Platforms
14.04	trusty	x86_64, i386, aarch64/arm64
16.04	xenial	x86_64, i386, ppc64el, aarch64/arm64
17.10	artful	x86_64, i386
18.04	bionic	x86_64

deb http://nginx.org/packages/ubuntu/ codename nginx
deb-src http://nginx.org/packages/ubuntu/ codename nginx

For Debian/Ubuntu then run the following commands:

apt-get update
apt-get install nginx

Start nginx

 $ sudo systemctl start nginxapt-get install nginx

 or 

 $ sudo service nginx start

Restart nginx

 $ sudo systemctl restart nginxapt-get install nginx

 or 

 $ sudo service nginx restart