у меня тока вариант - менять дату и делать
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тар, и прочия - как-то же востсанавливают их из архивов...
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NAME touch -- change file access and modification times SYNOPSIS touch [-acfhm] [-r file] [-t [[CC]YY]MMDDhhmm[.SS]] file ... DESCRIPTION The touch utility sets the modification and access times of files to the current time of day. If the file does not exist, it is created with default permissions. The following options are available: -a Change the access time of the file. The modification time of the file is not changed unless the -m flag is also specified. -c Do not create the file if it does not exist. The touch utility does not treat this as an error. No error messages are displayed and the exit value is not affected. -f Attempt to force the update, even if the file permissions do not currently permit it. -h If the file is a symbolic link, change the times of the link itself rather than the file that the link points to. Note that -h implies -c and thus will not create any new files. -m Change the modification time of the file. The access time of the file is not changed unless the -a flag is also specified. -r Use the access and modifications times from the specified file instead of the current time of day. -t Change the access and modification times to the specified time. The argument should be in the form ``[[CC]YY]MMDDhhmm[.SS]'' where each pair of letters represents the following: CC The first two digits of the year (the century). YY The second two digits of the year. If ``YY'' is specified, but ``CC'' is not, a value for ``YY'' between 69 and 99 results in a ``CC'' value of 19. Otherwise, a ``CC'' value of 20 is used. MM The month of the year, from 1 to 12. DD the day of the month, from 1 to 31. hh The hour of the day, from 0 to 23. mm The minute of the hour, from 0 to 59. SS The second of the minute, from 0 to 61.