Unix program used via command-line. See touchpad or touchscreen if your question relates to those instead.

touch is a standard Unix command that will work on any Unix-based system. It can be used to update or changes a file's (or directory's) time-stamp in regards to when it was last accessed and/or modified. It can also be used to create a new empty file.

Touch syntax is as follows:

  • touch [option] file to update a file
  • touch file to create a new file

This page and this page go into detail as to how to use the different options for the touch command. Wikipedia also has history and examples of usage of the touch command.

For questions about tactile interfacing see either:

history | excerpt history