2020.08.07
Set up a Firewall with UFW
Uncomplicated Firewall (UFW) is a simplified firewall management interface that hides the complexity of lower-level packet filtering technologies such iptables and uftables.
2020.05.19
Get Let's Encrypt certs with HAProxy and Nginx
I have used Nginx virtual host to get Let's Encrypt SSL certificates, it's easy and straightforward. However, when HAProxy was added in front of Nginx, some issues arises. So let's see how to deal with it.
2020.05.07
Setup h5ai with Nginx on Ubuntu server
h5ai is a modern file indexer for HTTP web servers with focus on your files. Directories are displayed in a appealing way and browsing them is enhanced by different views, a breadcrumb and a tree overview.
2020.04.05
Basics of load balancing with HAProxy
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).
2020.01.09
Setup an IKEv2 server with strongSwan
IKEv2, or Internet Key Exchange v2, is a protocol that allows for direct IPSec tunnelling between networks. It is developed by Microsoft and Cisco (primarily) for mobile users, and introduced as an updated version of IKEv1 in 2005. The IKEv2 MOBIKE (Mobility and Multihoming) protocol allows the client to main secure connection despite network switches, such as when leaving a WiFi area for a mobile data area. IKEv2 works on most platforms, and natively supported on some platforms (OS X 10.11+, iOS 9.1+, and Windows 10) with no additional applications necessary.
2019.12.19
Enable TCP BBR on Ubuntu server
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.
2019.12.17
Recursively delete all files of a specific extension
Safely delete all files with a specific extension (e.g. '.bak') from all subfolders, with just one command.
2019.12.05
Setting up snap Nextcloud on Ubuntu
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.
2019.12.04
Mac 自动下载切换壁纸
上回说到自己写个脚本去下载国家地理的每日一图，今天就完善（其实就是再写生中文滴）一下，让 Mac 自动去下载壁纸到指定文件夹，简单设置一下让 Mac 自动切换壁纸，给既定的生活添点变化。
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