https://rivik.dev/categories/linux/Recent content in Linux on Ilya Rusalowski HubHugoen-usThu, 19 Feb 2026 00:00:00 +0000https://rivik.dev/systemd-unreclaimable-kernel-memory-leak/Thu, 19 Feb 2026 00:00:00 +0000https://rivik.dev/systemd-unreclaimable-kernel-memory-leak/How a frequently-restarting systemd unit with Type=exec leaked unreclaimable kernel slab memory (~60 MB/day) on Ubuntu hosts via a cgroup memory-accounting bug — and why only a full host reboot could free it.https://rivik.dev/another-ubuntu-bug-with-a-stopgap-fix-apt-get-update-hangs-for-hours/Fri, 13 Feb 2026 00:00:00 +0000https://rivik.dev/another-ubuntu-bug-with-a-stopgap-fix-apt-get-update-hangs-for-hours/apt-get update randomly hangs for hours on Ubuntu 24.04 LTS — known since 22.04, still not fixed. Worst part: it silently blocks unattended-upgrades, so your servers stop receiving security updates. The ‘fix’ is a cron job that kills stuck apt processes.