How to configure SSH-key based authentication on Ubuntu 20.10
If you’re running an Ubuntu server, you know that security is job one. Password-based logins…
How to Fix “No rule to make target ‘debian/canonical-certs.pem” When Compiling Linux Kernel 5.11.11 and Later
If you’ve ever tried compiling a Linux kernel from source—whether to add custom system calls,…
GUFW and UFW Ubuntu 20.10 Firewall Configuration Guide
Security is paramount, and one of the first lines of defense for any system, whether…
How to use systemd Units on Ubuntu 20.04: A Sysadmin’s Deep Dive
If you’re managing Ubuntu servers or desktops, understanding systemd is absolutely essential. systemd is the init system and…
How to fix “Cannot Connect to the Docker Daemon” Error
If you’ve ever encountered the frustrating Cannot connect to the Docker daemon at unix:/var/run/docker.sock. Is…
Ubuntu 22.10 Boot Warnings: How to fix the “blacklist: Problem blacklisting hash (-13)” Boot Message in Ubuntu 22.10
If you’ve recently upgraded to Ubuntu 22.10 from version 22.04, you might have encountered an…
The Ultimate Guide to Viewing and Analyzing Core Dump Files on Ubuntu
When developing software, particularly in languages like C and C++, crashes are inevitable. The dreaded…
How to Turn off error sound on Ubuntu 18.04
Have you ever been working in your Ubuntu terminal when suddenly that jarring error sound…
How to Fix phpMyAdmin Login Issues with MySQL 5.7 on Ubuntu
If you’ve recently upgraded to Ubuntu 16.04 or newer with MySQL 5.7+, you might have…
How to Fix System is Not Set Up to Build Kernel Modules Error in Ubuntu
When working with virtual machines, you’ll likely encounter the frustrating error message: “This system is…