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.
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...
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...
Creating templated Systemd services
Last time I wrote an article about NAT traversal using FRP, which has been my personal solution for exposing SSH access of machines behind NAT to the internet for a long time.
Build a minimal Linux system and run it in QEMU
Linux is the #1 open-source operating system nowadays, and many people are running a Linux distro, such as Ubuntu or Arch. Linux is also the most popular choice for a server OS.
Filter manually installed packages from APT with AWK
It’s again when I want to find out what packages I have manually installed (or by a script) from the output of apt list, with all output on one line.
Setting up Ubuntu in VMware Workstation
A quick step-by-step guide for those wanting to get in touch with Ubuntu in a virtual machine with minimal effort. For example, at the start of a semester of Operating System Concepts course.