Technical notes on Linux, sysadmin, development and devops.
A slow site loses visitors, sales and ranking. Why a more powerful server almost never fixes it, which two numbers to check for free, and the real causes of slowness.
Why quotes and business emails end up in spam on Gmail and Outlook, how to tell if it is happening to you, and how it is actually fixed, without switching email provider.
Two RouterOS flaws, exploited in the wild since 2 September 2026, let anyone take over a MikroTik router with SSH exposed, no credentials needed. Who is at risk, how to check, how to update.
Where the tokens and passwords a CI/CD pipeline needs should live: why a secret in the repository cannot be deleted, masking and protected branches, short-lived identities with OIDC.
On 31 August 2026 Proxmox VE 8 leaves support: no more security fixes for kernel, QEMU and the cluster stack. What you risk by staying, what breaks in version 9 and how to upgrade without downtime.
What a CI/CD pipeline is, explained simply: continuous integration, continuous delivery, working examples with GitHub Actions and GitLab CI, and what is worth putting inside one.