Faultactor is an optional field that indicates the URI of the source of the fault.

Faultactor是可选的字段，它表示错误源的URI。

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Known hosts file (optional field) : The file that contains a list of known hosts.

Knownhostsfile (optional field)：包含已知主机列表的文件。

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But if the string is an address or optional field, you may have megabytes of zeroes on disk.

但如果字符串是一个地址或可选的字段，那么磁盘上可能会有成兆字节的零。

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Any optional field for which there is no meaningful data contains a zero (0) or a space as a placeholder.

任何不具有意义资料的选择性栏位都会包含一个零(0)或空格做为预留位置。

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Any optional field for which there is no meaningful data contains a zero (0) or a space as a placeholder.

任何不具有意义资料的选择性栏位都会包含一个零(0)或空格做为预留位置。

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