touch(1) -- Linux man page

 

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
-c, --no-create
do not create any files
-d, --date=STRING
parse STRING and use it instead of current time
-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 © 2004 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 PARTICULAR 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 coreutils touch

should give you access to the complete manual.