touch — Change File Access and Modification Times
Synopsis
/usr/bin/touch [-acm][-r ref-file | -t time] file... /usr/bin/touch [-acm] date-time] file... /usr/bin/settime [-f ref-file] file...
Description
Use the touch command to change access and modification times of files. If the file does not already exist, it is created.
You can specify the time used by -t time , by the corresponding time fields of the file referenced by -r ref-file , or by the date-time operand. If you specify none of these options, touch uses the current time (the value returned by the time(2) function).
If you specify neither the -a nor -m options, touch updates both ...
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