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Full Discussion: List 2 weeks older file on specific directory
Top Forums Shell Programming and Scripting List 2 weeks older file on specific directory Post 302928414 by jim mcnamara on Thursday 11th of December 2014 12:39:11 PM
Old 12-11-2014
mtime works days made of epoch seconds, see the stat structure for st_mtime.
There are 86400 seconds per day. -mtime 14 means EXACTLY, to the second, 86400*14 seconds ago. -mtime +14 means any file mtime equal to or greater than 86400*14,
-mtime -14 means less than 86400*14.


Some ways to get file by filetime using find (in the context of post #1)

With:
Today = Dec 12, two weeks ago = Nov 27

These examplesrefer to mtime, the last time the file was opened and written to. NOT
when it was created, but it usually works out to the same thing in most
users view. This is using POSIX find. Linux find is slightly different but
will work with these examples.

Note: touch examples are accurate to the minute only. touch -t syntax seems to vary.
Check your system.
Note: some filesystems have more precision on filetimes than others.

Note: "start" and "end" are dummy files in the current directory, a
directory that you can write in. I personally use dummy, dummy1, and
dummy2 so I know what they are and why they are empty. start and end are
clearer for this example. IMO.

1. get files last written exactly before Nov 27 at midnight
Code:
touch -t 201411270000 end
find /path -type f ! -newer end

2. get files written after Nov 27, i.e., from the first second of Nov 28 -> present

Code:
# you should add seconds to the touch -t value
touch -t 201411272359 start
find /path -type f -newer start

3. Using mtime for files older than some number of days. mtime uses days
based on 86400 seconds per day. STARTING RIGHT NOW. So if you execute this
at 1500 you will get files which will have filetime of 1521 (and greater)
on what seems to be the wrong day. mtime does understand the calendar.

Code:
# older files more then 14 * 86400 seconds old.
find /path -type f -mtime +14
# newer - files written after (the time and date of) 84600 * days in the past
find /path -type f -mtime -14

4. get files from two past times - a range Nov 7 -> Nov 20.
No files from Nov 6 and earlier, and no files dated Nov 21 -> now

Code:
# mind the touch seconds
touch -t 201411070000 start
touch -t 201411202359 stop
find /path -type f \( -newer start -a  ! -newer end \)

 

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LEARN ABOUT REDHAT

touch

TOUCH(1)							   User Commands							  TOUCH(1)

NAME

       touch - change file timestamps

SYNOPSIS

       touch [OPTION]... FILE...

DESCRIPTION

       Update the access and modification times of each FILE to the current time.

       Mandatory arguments to long options are mandatory for short options too.

       -a     change only the access time

       -B, --backward=SECONDS
	      Modify  the time by going back SECONDS seconds.  For example, touch -r foo -B 5 bar will make the file bar 5 seconds older than file
	      foo.

       -c, --no-create
	      do not create any files

       -d, --date=STRING
	      parse STRING and use it instead of current time

       -F, --forward=SECONDS
	      Modify the time by going forward SECONDS seconds.  For example, touch -r foo -F 5 bar will make the file bar 5  seconds  newer  than
	      file foo.

       -f     (ignored)

       -m     change only the modification time

       -r, --reference=FILE
	      use this file's times instead of current time

       -t STAMP
	      use [[CC]YY]MMDDhhmm[.ss] instead of current time

       --time=WORD
	      set time given by WORD: access atime use (same as -a) modify mtime (same as -m)

       --help display this help and exit

       --version
	      output version information and exit

       Note that the -d and -t options accept different time-date formats.

AUTHOR

       Written by Paul Rubin, Arnold Robbins, Jim Kingdon, David MacKenzie, and Randy Smith.

REPORTING BUGS

       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

       Copyright (C) 2002 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       The full documentation for touch is maintained as a Texinfo manual.  If the info and touch programs are properly installed  at  your  site,
       the command

	      info touch

       should give you access to the complete manual.

touch (coreutils) 4.5.3 					   October 2002 							  TOUCH(1)
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