$ gem help env
Usage: gem environment [args] [options]
Common Options:
--source URL Use URL as the remote source for gems
-p, --[no-]http-proxy [URL] Use HTTP proxy for remote operations
-h, --help Get help on this command
-v, --verbose Set the verbose level of output
--config-file FILE Use this config file instead of default
--backtrace Show stack backtrace on errors
--debug Turn on Ruby debugging
Arguments:
packageversion display the package version
gemdir display the path where gems are installed
gempath display path used to search for gems
version display the gem format version
remotesources display the remote gem servers
<omitted> display everything
Summary:
Display RubyGems environmental information
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