Mtime,cime,atime fog of Linux Find Lookup command

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Find-search for files in a directory hierarchy ( [' harɑk] hierarchy, Hierarchy )

Search for files in the directory hierarchy

There are two more plausible explanations in the man Help:

• -atime N

File was last accessed n*24 hours ago. (Before n*24 hours of file access) when find figures out how many 24-hour period s ago The file was last accessed, any fractional ([' Frk () n () l], partial, fractional) part are ignored, so to Match-ati Me +1, a

File had to be been accessed at least-days ago.

When find calculates the number of 24-hour cycles before the file was last accessed, the fractional part is ignored, so matching-atime + 1 o'clock, a file is accessed at least 2 days in advance.

• Find $HOME-mtime 0

Search for files in your home directory which has been modified in the last Twenty-four hours. (Searching in your home directory in the previous 2 Files changed over 4 hours)This command works this to because the time since each file were last modified are divided byhours and any remainder are discarded. (This command works because the last modified time for each file is divided by 24 hours, and any remaining part is discarded. ) That means this to Match-mtime 0, a file would haveThe modification in the past which are less than hours ago.(this means that matching-mtime 0, the file must have been changed in the past less than 24 hours ago .) )

You will find that the 1th is really not how to understand, the 2nd example, can illustrate a certain realistic correctness, but still confusing, there is no fundamental unified expression, so can only find resources, see how other netizens explain, and their own at the bottom of the experiment, there is probably a similar rule:

The Mtime example:

Mtime +n: Indicates that there is an elimination zone between the current time, (n+1) *24h, i.e. (current time-(n+1) *24h),-∞

Mtime N: Indicates from (current time-n*24h) (current time-(n+1) *24h)

Mtime-n: Indicates (current time-n*24h)-Current time (+∞)

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Mtime,cime,atime fog of Linux Find Lookup command