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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.

?????? A FILE argument that does not exist is created empty, unless -c?? ?or? -h
?????? is supplied.

?????? A? FILE?? ?argument? string of - is handled specially and causes touch to
?????? change the times of the file associated with standard output.

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

?????? -a???? change only the access time

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

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

?????? -f???? (ignored)

?????? -h, --no-dereference
?? ?????? affect each symbolic link instead of any referenced file (useful
?? ?????? only on systems that can change the timestamps of a symlink)

?????? -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
?? ?????? change the specified time: WORD is access, atime, or use: equiv-
?? ?????? alent to -a WORD is modify or mtime: equivalent to -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.

DATE STRING
?????? The? --date=STRING? is? a mostly free format human readable date string
?????? such as "Sun, 29 Feb 2004 16:21:42 -0800" or "2004-02-29?? ? 16:21:42"? or
?????? even? "next Thursday".? A date string may contain items indicating cal-
?????? endar date, time of day, time zone, day of week, relative? time,?? ? rela-
?????? tive date, and numbers.?? ?An empty string indicates the beginning of the
?????? day.? The date string format is more complex than is easily? documented
?????? here but is fully described in the info documentation.

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

REPORTING BUGS
?????? Report touch bugs to bug-coreutils@gnu.org
?????? GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
?????? General help using GNU software: <http://www.gnu.org/gethelp/>
?????? Report touch translation bugs to <http://translationproject.org/team/>

COPYRIGHT
?????? Copyright ? 2010 Free Software Foundation, Inc.?? ? License? GPLv3+:? GNU
?????? GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
?????? This? is?? ? free? software:? you? are free to change and redistribute it.
?????? There is NO WARRANTY, to the extent permitted by law.

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 coreutils 'touch invocation'

?????? should give you access to the complete manual.



GNU coreutils 8.4?? ??? ??? June 2012?? ??? ??? ?????? TOUCH(1)

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