Describe The Environment Variables Present In Ruby.
RUBYOPTAdditional command-line options to Ruby; examined after real command-line options are parsed ($SAFE must be 0).RUBYLIBAdditional search path for Ruby programs ($SAFE must be 0).RUBYPATHWith -S option, search path for Ruby programs (defaults to PATH).RUBYSHELLShell to use when spawning a process; if not set, will also check SHELL or COMSPEC. DLN_LIBRARY_PATH Search path for dynamically loaded modules.RUBYLIB_PREFIX(Windows only) Mangle the RUBYLIB search path by adding this prefix to each component.
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