Touch

TOUCH(1)

User Commands TOUCH(1)

NAME

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• touch - change file timestamps

SYNOPSIS

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• touch [OPTION]... FILE...

DESCRIPTION

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• 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 [[CC]YY]MMDDhhmm[.ss] use specified time instead of current time, with a date-time format that differs from -d's
  • --time=WORD specify which time to change: access time (-a): 'access', 'atime', 'use'; modification time (-m): 'modify', 'mtime'
  • --help display this help and exit
  • --version output version information and exit

DATE STRING

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• 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 calendar date, time of day, time zone, day of week, relative time, relative 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

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

REPORTING BUGS

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• GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
• Report any translation bugs to <https://translationproject.org/team/>

COPYRIGHT

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• Copyright © 2024 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://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

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• Full documentation <https://www.gnu.org/software/coreutils/touch> or available locally via: info '(coreutils) touch invocation'

COLOPHON

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• This page is part of the coreutils (basic file, shell and text manipulation utilities) project. Information about the project can be found at ⟨http://www.gnu.org/software/coreutils/⟩. If you have a bug report for this manual page, see ⟨http://www.gnu.org/software/coreutils/⟩. This page was obtained from the tarball coreutils-9.5.tar.xz fetched from ⟨http://ftp.gnu.org/gnu/coreutils/⟩ on 2024-06-14. If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to man-pages@man7.org

GNU coreutils 9.5 March 2024 TOUCH(1) Pages that refer to this page: last(1@@util-linux), utime(2), utimensat(2), systemd-update-done.service(8)

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