The update is in, the vulnerability is still alive

Articles

• apt / dpkg — package management — Installing, upgrading, and removing packages on Debian/Ubuntu; apt and dpkg.
• /proc: processes and the kernel as files — A filesystem with no disk behind it: the kernel shows processes there (/proc/<PID> — state, open files, limits) and its own state — memory, load, parameters in /proc/sys.
• Processes — Viewing processes, signals and priorities; finding the processes that hog CPU or memory.
• lsof — open files and ports of processes — lsof shows which process holds a file, a port, or a deleted file that is still open.
• unattended-upgrades: security updates with no one at the keyboard — The Ubuntu service that installs updates from allowed origins once a day on an apt timer — by default only security updates. It does not restart running services itself; needrestart does.
• systemctl — managing systemd services — Command for managing systemd units and inspecting their state.