Practical guides to running Linux servers, control panels and clusters with an AI operator that plans, executes and verifies.
Mail bouncing back with an SPF, DKIM or DMARC complaint means a specific record or signature is broken, not that Postfix itself is misconfigured.
Read the guideOne hosted domain's compromised contact form can get your whole Plesk server's IP blacklisted. Here is how to find the cause and get delisted properly.
Read the guideA cPanel migration goes wrong when DNS, mail and the database fall out of sync with each other. Here is the order that avoids downtime and lost email.
Read the guideExit code 137 is not a crash in your application code, it is the kernel or Docker forcibly killing the container, and the cause is almost always memory.
Read the guideLoad spiking on a DirectAdmin box with no obvious cause usually means one hosted domain is being flooded. Find it fast, before every other site on the server goes down with it.
Read the guideUnlike cPanel, DirectAdmin ships with no built-in malware scanning, so an infected account often stays hidden until an external warning arrives. Here is what to do once one has.
Read the guideA disk at 100% is not gradual, everything that writes to it starts failing at once: mail queues, backups, log files, even DirectAdmin's own interface.
Read the guideOutbound mail flooding out of a server nobody logged into means something else is doing the sending. Here is how to find it and shut it down.
Read the guideA malware scanner flagging a plugin file you just installed yourself is not automatically wrong, but it is not automatically right either. Here is how to actually check.
Read the guidePackage for package, AlmaLinux and Rocky Linux are nearly identical rebuilds of RHEL. The decision actually comes down to governance and who backs each project.
Read the guideA practical comparison of what network firewalls and Web application firewalls can see, where each one stops attacks, and why Layer 7 floods expose the difference.
Read the guideConnect a server in about a minute. The first week is on us.
