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- .SH ENVIRONMENT
- The following two environment variables (if defined) are used
- by \*(NM:
-
- .IP "$PROMPT_USER"
- If this variable exists and is non-empty, then the user will be
- interactively prompted for any missing required arguments.
-
- .IP "$USAGE_LEVEL"
- This variable controls the verboseness of usage messages that are printed.
- If This variable is empty or is undefined, then verbose messages are printed.
- If this variable exists and is non-empty, it may be set to one of the
- following values:
- .RS
- .IP 0
- No usage message is printed.
- .IP 1
- A terse usage message is printed
- .IP 2
- A verbose usage message is printed.
- .RE
-