z/OS UNIX System Services User's Guide
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The POSIX portable file name character set

z/OS UNIX System Services User's Guide
SA23-2279-00

To simplify conversion requirements, use the POSIX portable file name character set when naming your files:
  • Uppercase A to Z
  • Lowercase a to z
  • Numbers 0 to 9
  • Period (.)
  • Underscore (_)
  • Hyphen (-)

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