公共机房的系统保护、用户环境管理、应用软件升级安装及维护等工作是机房管理中公认的难题。
The recognized difficult problems in computer room management are as follows: system protection, user environment management, update and maintenance of application software etc.
然而，允许应用软件拥有编写文件的权限，是一件非常危险的事情，特别在一个公共使用的环境下。
However, letting an application have write access to your files is a dangerous thing, particularly in a public environment.
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