touch changes both the last access and last modified time
of FileName to the current time. FileName is created if not found.
FileName may contain wildcards (?,*).
If FileName begins with the name following is assumed
to be a text file containing the names of files to touch.
Leading and trailing blanks are trimmed, and blank lines
or lines with ; as the first character are skipped.
Use by itself to read the standard input.
Change only the access time.
Do not create files.
Also change creation time.
Use given date (format per system settings).
Increase current file date by n days (negative to decrease).
Round file time to FAT time (nearest 2 seconds).
Change only the modified time.
Increase current file time by n minutes (negative to decrease).
-r, -reference (self-reference)
Change modified and/or access time to creation time.
When used with -fat option, converts existing time(s) to FAT time.
Use time of reference file instead of current time.
Use given time (format per system settings).
mailto:sales1To see complete usage, type touch /? | more