<ul><li>With Ubuntu 24.04 LTS, Canonical has optimized SSH by using socket-based activation instead of a standalone service by default.</li><li>This change improves memory efficiency, especially for VMs and containers, as SSH is only active when needed.</li><li>Configuring a custom SSH port has become easier in Ubuntu 24.04 as it now dynamically pulls port settings from /etc/ssh/sshd_config.</li><li>Users who prefer the traditional method can disable socket-based activation and restore the classic behavior of SSH in Ubuntu 24.04.</li></ul>

Understanding SSH Socket-Based Activation in Ubuntu 24.04

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