How to redirect http traffic to https in nginx configuration.

Let’s Encrypt is a free, automated, and open CA (Certificate Authority) and let’s make use of it to enable ssl access to web application serviced by nginx.

A compiler error was observed during installing lxml on ubuntu the error looks something like: error: command ‘x86_64-linux-gnu-gcc’ failed with exit status 4, and it’s most likely caused by low memory.

With python2 builtin SimpleHTTPServer (or http.server in python3), you can start an http service to easily and quickly share a directory with files, which is especially useful and convenient in LAN environments.

How to use nginx to proxy http request to default port (e.g. 80) to other processes running on different ports on the same server.

Pagekite.py is tool using reverse proxy to create a tunnel to your localhost which is then publicly accessible from outside your networks, and this is also known as localhost tunneling which is especially useful when you want to quickly test or access a local running web app behind NAT and firewall from outside of your networks and don’t want to go through the complicated processes such as: buying a cloud-based server like vps for dns configuration with public static ip, or deployment to cloud based instances like aws ec2, and etc.

A script to convert mysql to sqlite.

How to use python dict as data source for mysql insert-into statement.

Java generates base64 encoded hmac with sha256.

Java Executors ThreadPool example with Callable and Future.