system-or-user-ns

This option is only available for system services, or for services running in per-user instances of the service manager in which case PrivateUsers= is implicitly enabled (requires unprivileged user namespaces support to be enabled in the kernel via the kernel.unprivileged_userns_clone= sysctl).

These options are only available for system services, or for services running in per-user instances of the service manager in which case PrivateUsers= is implicitly enabled (requires unprivileged user namespaces support to be enabled in the kernel via the kernel.unprivileged_userns_clone= sysctl).