How does linux command “find” and “mtime” really work?

In Unix-like and some other operating systems, find is a command-line utility that searches one or more directory trees of a file system, locates files based on some user-specified criteria and applies a user-specified action on each matched file.

 

find files modified greater than 24 hours ago

 

find files modified between now and 1 day ago (notice the missing “+” and “-“)

 

find files modified less than 1 day ago (this is the same as -mtime 0)

 

find files modified between 24 and 48 hours ago

 

find files modified more than 48 hours ago

 

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