Centralized Linux authentication with OpenLDAP
LDAP, the #1 way to get your graduation delayed (as has always been the meme around Tsinghua University), is every SysAdmin’s dream tool for their servers. As mighty as its rumors fly, LDAP takes t...
Install Proxmox VE on eMMC
Recently I bought a mini PC looking forward to setting up a home router. It started quite well except the specs were higher than I anticipated. 8 GB RAM plus 128 GB eMMC - too much waste for “just ...
New Pandora’s box: Install Linux and Windows onto the same NTFS partition
Linux 5.15 is shipped with a brand new driver for Microsoft’s classic NTFS filesystem, NTFS3. Unlike the decades-old open-source NTFS-3G project, which is based on FUSE and have always received cri...
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$56/mo, and also Windows VPS with 4 vCPUs and 4 GB RAM at HK$...
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....
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.
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...
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.