Reinstall Windows VPS into Linux with iPXE network boot

This November I found a discount from one of my favorite VPS providers, NETfront. They offered Linux VPS with 2 vCPUs and 2 GB RAM at HK$56/mo, and also Windows VPS with 4 vCPUs and 4 GB RAM at HK$...

3 minute read

Secure site-to-site connection with Linux IPsec VPN

Linux has a built-in framework for Internet Protocol Security (IPsec), which is often combined with other tunneling technologies (e.g. L2TP and GRE) to create secure cross-site network connections....

15 minute read

Disassembling a hardware RAID 1 array in Proxmox VE

Yesterday in a server maintenance period, we decided to tune the storage layout of our Proxmox VE server, which included disassembling a RAID 1 array and adjusting the size of the root filesystem.

7 minute read

A Deep Dive into Containers

Since years ago, containers have been a hot topic everywhere. There are many container softwares like Docker, Linux Containers and Singularity. It’s hard to say one understand what containers are w...

24 minute read

Use RSA CA Certificates with OpenSSH 8.2

OpenSSH 8.2 is coming to the latest Long-Term Service release of Ubuntu, Focal Fossa (20.04), and has some breaking changes for users using an SSH Certificate Authority.

3 minute read

3 ways to use MySQL / MariaDB CLI without password

For all of us who are learning to use or developing with MySQL or MariaDB, it’s a common task to manually log in to the database for inspection. This is usually done with the mysql command line cli...

4 minute read

Managing servers with OpenSSH Certificate Authority

Since the addition of the website server for an external corporation, I now have 5 Linux servers to manage on my own. I also have 4 terminal devices that I use to connect to those servers: two of m...

6 minute read