比如，一个进入该系统的helpdesk代理更新许可仅仅能访问固定的选项集。
For example, a helpdesk agent updating tickets entered in the system has access only to the fixed set of options. The list is set and provides no means of freeform entry.
上面列出的前三个方法都是有效的选项，但本文的讨论将以第四个方法为重点，采用渐进的方法更新银行核心系统。
The first three approaches listed above are valid options, but the focus for this discussion is the fourth approach, the progressive renewal of banking core systems.
前面的两个 mount 选项关闭 atime 更新，几乎不需要 atime 更新，并且它除了降低文件系统性能之外几乎不起任何作用。
The first two mount options turn off atime updates, which are very rarely needed and serve little purpose other than to degrade filesystem performance.
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