UNIX in a Nutshell: System V Edition

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UNIX Commands
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touch [options] [date] files

For one or more files, update the access time and modification time (and dates) to the current time and date, or update to the optional date. date is a date and time in the format mmddhhmm[yy]. touch is useful in forcing other commands to handle files a certain way; e.g., the operation of make, and sometimes find, relies on a file's access and modification time.



Update only the access time.


Do not create nonexistent files.


Update only the modification time.

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