Change file timestamps, change the access and/or modification times of the specified files.

      touch [OPTION]... FILE...


  If the first FILE would be a valid argument to the `-t' option and
no timestamp is given with any of the `-d', `-r', or `-t' options and
the `--' argument is not given, that argument is interpreted as the
time for the other files instead of as a file name.

   Any FILE that does not exist is created empty.

   If changing both the access and modification times to the current
time, `touch' can change the timestamps for files that the user running
it does not own but has write permission for.  Otherwise, the user must
own the files.


     Change the access time only.

     Do not create files that do not exist.

     Use TIME instead of the current time.  It can contain month names,
     timezones, `am' and `pm', etc.

     Ignored; for compatibility with BSD versions of `touch'.

     Change the modification time only.

     Use the times of the reference FILE instead of the current time.

-t [[CC]YY]MMDDhhmm[.ss]
     Use the argument (optional four-digit or two-digit years, months,
     days, hours, minutes, optional seconds) instead of the current
     time.  If the year is specified with with only two digits, then CC
     is 20 for years in the range 0 ... 68, and 19 for year in 69 ...
     99.  If no digits of the year are specified, the argument is
     interpreted as a date in the current year.

Related commands:

chgrp - Change group ownership
date - Display or change the date
chmod - Change access permissions
chown - Change file owner and group
which - Show full path of commands

Equivalent Windows NT commands:

TOUCH - Change file timestamps

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Simon Sheppard