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Ubuntu guides

Hands-on guides that cover Ubuntu. Every command is run and verified on a live server before it is published.

Run the ufw firewall Ubuntu ships with: control which ports the outside can reach, read the rule status on a server, and enable default deny safely.

Learn what snap and flatpak on Ubuntu are, how they bundle dependencies unlike apt packages, and when each one is a sensible choice.

See how Ubuntu applies security updates automatically with unattended-upgrades, and check the setting on a live server so you know it is on.