Linux
Load average is one of the most-cited and least-useful metrics on a Linux box. It conflates running and uninterruptible processes, smooths over 1/5/15-minute windows, and tells you nothing about what the system is waiting on. A load of 8 on a 16-core box could
Linux
QEMU 11.0 arrived after a four-release candidate cycle with significant architecture drops, improved VM migration, and expanded CPU/architecture support. The headline: 32-bit host support is gone, and several deprecated machine types have been removed. If you're running QEMU on legacy 32-bit hardware or
Linux
Canonical released Ubuntu 26.04 LTS (Resolute Raccoon) as the latest long-term support release. Shipping with Linux 7.0, APT 3.2's native rollback features, Wayland-only GNOME 50, and significant server component upgrades, this release targets systems wanting the latest technologies with 5–15 years of
Linux
With nginx's recent disclosure of multiple CVEs in the 1.27.x–1.30.x line (HTTP/2 request injection, buffer overflows in rewrite/SCGI/uWSGI/charset modules, HTTP/3 address spoofing, and a use-after-free in OCSP resolver), a lot of admins are stuck on Ubuntu&
Linux
A misconfigured /etc/network/interfaces on a remote Proxmox host means console-only recovery. Most of these gotchas don't surface during normal operation — they surface during dist-upgrade, after a reboot, or the first time a VM tries to migrate. Here's the list, ordered roughly by
Linux
Hetzner's dedicated server networking trips up everyone the first time. The gateway isn't in the same subnet as the IPs you're assigning. Additional IPs are routed individually as /32s, not as a contiguous on-link subnet. The upstream switch MAC-filters by default, so
Linux
Use zstd for everything new. It's faster on both ends, compresses better at equivalent CPU cost, and is multi-threaded by default. Stick with gzip/tar.gz only when you need maximum portability to ancient/minimal systems (older than ~2018). Quick Reference Table Dimension gzip (tar.gz) zstd
Linux
Table of Contents 💡This post assumes you've Proxmox VE 7.4.x, non-enterprise without ceph * Pre-flight Checks * Phase 1 - Backup the VM to /backup * Phase 2 - Session Safety * Phase 3 - Upgrade 7.4 to 8.x * Phase 4 - Reboot and Verify on 8.x * Phase 5