Which command in SSH config settings is used to specify user hosts?

The command used in SSH config settings to specify user hosts is "Host." This directive is part of the SSH client configuration file, typically found at ~/.ssh/config. When you use the "Host" command, you define specific patterns for hostnames that the SSH client will recognize. For instance, you can define configurations that apply to all connections to a certain domain or server, which allows you to set options like user name, port number, and other settings specific to that host or pattern of hosts.

Using the "Host" directive is fundamental for customizing SSH behavior to fit the needs of multiple servers or environments, making it easier to connect without needing to enter long command-line options repeatedly.

The other terms mentioned, while related to SSH configuration, serve different purposes. "UserHost" is not a valid directive; "HostName" is used to define the real hostname or IP address of the server if it's different from what you specified in the "Host" directive; and "AuthorizedHosts" is not a recognized directive within the SSH config context as well. Thus, "Host" is the right choice for designating user hosts in SSH configurations.