Steps to create SSL certificate for nginx (most steps applicable for other server softwares as well)

Create-SSL-Certificate.md

#####Dependency: openssl#####

1. Create directory:

sudo mkdir /etc/nginx/ssl
cd /etc/nginx/ssl

2. Create private server key:

sudo openssl genrsa -des3 -out server.key 1024

3. Create certificate signing request

sudo openssl req -new -key server.key -out server.csr

4. Remove passphrase so nginx doesn't ask for it everytime you start it:

sudo cp server.key server.key.org
sudo openssl rsa -in server.key.org -out server.key

5. Sign your certificate:

 sudo openssl x509 -req -days 365 -in server.csr -signkey server.key -out server.crt

6. Setup certificate in /etc/nginx.conf:

#HTTPS server
server {
        listen 443;
        server_name example.com;

        root /usr/share/nginx/www;
        index index.html index.htm;

        ssl on;
        ssl_certificate /etc/nginx/ssl/server.crt;
        ssl_certificate_key /etc/nginx/ssl/server.key; 
}