Blog

If you are managing email for a small business or a hosting client, you have likely encountered the dreaded "SPF PermError: too many DNS lookups" rejection. This error does not mean your server is compromised or that your domain is blacklisted. It means your SPF (Sender Poli... (Read more)

A kernel panic is a fatal system error from which the Linux kernel cannot safely recover. When this happens, the operating system stops all execution to prevent data corruption. The only way to find the real cause of a kernel panic is to read the core dump generated at the e... (Read more)

The Virtualization Revolution That Nobody Expected If you read the guides from 2025 about Proxmox VE and enterprise virtualization, you learned about a powerful, cost-effective platform that was posi... (Read more)

Introduction: Why Your 2024 Git Server Needs an Upgrade If you followed the popular tutorials from 2024 on setting up a bare Git server on your VPS... (Read more)

In the life of every systems administrator, there is a moment of pure dread: reports start flooding in that "the site is down," but when you check the server, everything seems fine. The... (Read more)

If you manage a Linux VPS long enough, you know the drill: the site goes down, Nginx returns a "502 Bad Gateway," and your system logs (`dmesg` or `/var/log/syslog`) are screaming Out of memory: Kill process (php-fpm). This is the Linux kernel's... (Read more)