(coreutils.info)basename invocation

18.1 `basename': Strip directory and suffix from a file name
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`basename' removes any leading directory components from NAME.
Synopsis:

     basename NAME [SUFFIX]

   If SUFFIX is specified and is identical to the end of NAME, it is
removed from NAME as well.  `basename' prints the result on standard
output.

   The only options are `--help' and `--version'.  Note: Common
options.

   An exit status of zero indicates success, and a nonzero value
indicates failure.