touch - change file timestamps
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
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.
- 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
- -h, --no-dereference
- affect each symbolic link instead of any referenced file
(useful only on systems that can change the timestamps of a symlink)
- 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
- change the specified time: WORD is access, atime, or use:
equivalent to -a WORD is modify or mtime: equivalent to
- display this help and exit
- output version information and exit
Note that the -d
options accept different time-date
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.
Written by Paul Rubin, Arnold Robbins, Jim Kingdon, David MacKenzie, and Randy
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report touch translation bugs to <http://translationproject.org/team/>
Copyright © 2017 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.
Full documentation at: <http://www.gnu.org/software/coreutils/touch>
or available locally via: info '(coreutils) touch invocation'