怎样判断某文件是否存在？

How to determine whether a file exists?

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如果重复的次数足够多，每个网络系统就会与某单一的存储文件内容相一致。

Repeat it enough and each network will correspond with a single bin.

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用户配额限制某特定用户的全部文件的大小。

User quotas limit the total file size for a specific user.

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组配额则限制某组的文件大小。

Group quotas limit the file size for an entire group.

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也可以只列目录名称，或者只列某系扩展名的文件名。

Can also be out only a directory name, or simply set out a line extension of the file name.

youdao

也可以只列目录名称，或者只列某系扩展名的文件名。

Can also be out only a directory name, or simply set out a line extension of the file name.

youdao