Installing a Custom Linux Kernel in a Virtual Machine

Sun, 20 Sep 2026 00:00:00 +0000

This article has one goal: compile and install a custom kernel in Ubuntu running inside VMware, then load a .ko module I wrote myself.

Compilation and kernel replacement both happen in that virtual machine. They consume CPU, memory, and disk space and involve GRUB. Unstable networking can interrupt long builds or SSH sessions; without booting the new kernel, the module will not match the running version. The order is therefore static IP first, custom kernel second, and module last.

SSH Login and Security Hardening on Linux Servers

Mon, 31 Aug 2026 00:00:00 +0000

My recent SSH experiments on a VPS involved public-network timeouts, private-key permission errors, and port changes that systemd did not pick up. This article combines several Obsidian notes in the order of getting connected, hardening access, and coordinating firewall rules.

From client to server: allowing traffic through the cloud security group, UFW, and sshd

Illustrative placeholders

IPs are represented by ip1, ip2, and similar placeholders, for example ip1 for the server and ip2 for an allowed source. The domain xxx.xxx.com, ports such as 22222, and username are also example placeholders, not a real environment. Replace them with your own values.

Linux on YHY Study Website

Installing a Custom Linux Kernel in a Virtual Machine

SSH Login and Security Hardening on Linux Servers