true

$ man true
NAME
       true - do nothing, successfully

SYNOPSIS
       true [ignored command line arguments]
       true OPTION

DESCRIPTION
       Exit with a status code indicating success.

       --help display this help and exit

       --version
              output version information and exit

       NOTE:  your  shell may have its own version of true, which usually supersedes
       the version described here.  Please refer to your
       shell's documentation for details about the options it supports.

No hay nada como hacer sólo una cosa, pero hacerla bien...

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