这些更新服务器提供不同的发行版，可以把服务器的维护外包，包括当前的软件状态、更新和补丁。
These update servers are available for different distributions and offer the advantage of outsourcing the maintenance of the server, including the current software status, updates, and fixes.
如果有服务器更新，那么使用updateios命令安装补丁。
If you have an update for the server, use the updateios command to install any patches.
因为在您的企业之外实现发行版补丁和更新，应该确保服务器的所有者是可信的组织。
Because implementing fixes and updates in the distribution is owned outside of your organization, the server host should be a trusted organization.
当您在一组物理服务器上同时执行补丁操作和其他更新时，您需要十分小心；同样，在虚拟服务器上执行相同的操作也要很小心。
Just as you would exercise care in performing simultaneous patching and other updates on a group of physical servers, you should be careful about doing the same thing in your virtual servers.
当您在一组物理服务器上同时执行补丁操作和其他更新时，您需要十分小心；同样，在虚拟服务器上执行相同的操作也要很小心。
Just as you would exercise care in performing simultaneous patching and other updates on a group of physical servers, you should be careful about doing the same thing in your virtual servers.
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