`service-name`和`service-target`有什么区别？

请考虑以下命令

# launchctl stop 
Usage: launchctl stop <service-name>
# launchctl stop com.apple.SomeService
# launchctl disable com.apple.SomeService
Usage: launchctl disable <service-target>

服务目标和服务名称之间有什么区别？如何从服务名称中学习服务的服务目标？

服务目标是服务名称加上目标域，它描述服务运行的上下文，例如它是在系统启动时运行还是在特定用户登录时运行。

launchctl（1）联机帮助页描述了从服务名称形成服务目标的6种方法。如果要禁用在启动时运行的服务，您可能需要这三个中的一个，具体取决于它是在系统启动时运行还是在您登录时运行的服务：

system/[service-name]
    Targets the system domain or a service within the system domain. The system
    domain manages the root Mach bootstrap and is considered a privileged execu-
    tion context. Anyone may read or query the system domain, but root privi-
    leges are required to make modifications.

user/<uid>/[service-name]
    Targets the user domain for the given UID or a service within that domain. A
    user domain may exist independently of a logged-in user. User domains do not
    exist on iOS.

gui/<uid>/[service-name]
    Another form of the login specifier. Rather than specifying a user-login
    domain by its ASID, this specifier targets the domain based on which user it
    is associated with and is generally more convenient.

您可以找到您的用户帐户的uid号码，如下所示：

$ id -u [your-username]
502