HAProxy is free, open source software that provides a high availability load balancer and proxy server for TCP and HTTP-based applications. Its most common use is to improve the performance and reliability of a server environment by distributing the workload across multiple servers (e.g. web, application, database).
IKEv2, or Internet Key Exchange v2, is a protocol that allows for direct IPSec tunneling between the server and client. In IKEv2 implementations, IPSec provides encryption for the network traffic. IKEv2 is natively supported on some platforms (OS X 10.11+, iOS 9.1+, and Windows 10) with no additional applications necessary, and it handles client hiccups quite smoothly.
TCP BBR is a TCP congestion control algorithm developed by Google. It tackles shortcomings of traditional TCP congestion control algorithms (Reno or CUBIC). According to Google, it can achieve orders of magnitude higher bandwidth and lower latency.
Safely delete all files with a specific extension (e.g. '.bak') from all subfolders using one command.
Nextcloud, a fork of ownCloud, is a open-source file sharing server that allows you to store your personal content, like documents and pictures, in a centralized location, much like Dropbox. It also returns the control and security of your sensitive data back to you, thus eliminating the use of a third-party cloud hosting service. Here, I'm going to walk through the installing and configurations on Ubuntu 18.04 using the snappy packaging system.