Conceptmodification time / 文件修改时间
mtime
Metadata in Unix file systems that records the timestamp of the last modification to a file's contents. It is commonly used to determine whether a data pipeline has refreshed its data.
Timeline (last 90 days)
Oct 19
In Unix systems, a file's mtime records the timestamp of the last modification to the file's contents; it can serve as supporting evidence of whether data has been updated, but because it may change when identical content is rewritten, it is not a content-level criterion.
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