gem update --system

gem update --system

修改完gem sources之后，进行gem update；

gem update --system

之后的输出：

C:\Sites\test01>gem sources -l
*** CURRENT SOURCES ***

http://gems.ruby-china.org/

C:\Sites\test01>gem -v
2.5.

C:\Sites\test01>gem update --system
Updating rubygems-update
Fetching: rubygems-update-2.6..gem (%)
Successfully installed rubygems-update-2.6.
Parsing documentation for rubygems-update-2.6.
Installing ri documentation for rubygems-update-2.6.
Installing darkfish documentation for rubygems-update-2.6.
Done installing documentation for rubygems-update after  seconds
Parsing documentation for rubygems-update-2.6.
Done installing documentation for rubygems-update after  seconds
Installing RubyGems 2.6.
RubyGems 2.6. installed
Parsing documentation for rubygems-2.6.
Installing ri documentation for rubygems-2.6.

=== 2.6. / --

Bug fixes:

* Install native extensions in the correct location when using the
  `--user-install` flag. Pull request # by Noah Kantrowitz.
* When calling `Gem.sources`, load sources from `configuration`
  if present, else use the default sources. Pull request #
  by Luis Sagastume.
* Fail gracefully when attempting to redirect without a Location.
  Pull request # by Samuel Giddins.
* Update vendored Molinillo to 0.5.. Pull request # by
  Samuel Giddins.

=== 2.6. / --

Bug fixes:

* Sort installed versions to make sure we install the latest version when
  running `gem update --system`. As a one-time fix, run
  `gem update --system=2.6.`. Pull request # by David Radcliffe.

=== 2.6. / --

Minor enhancements:

* Support for unified Integer in Ruby 2.4. Pull request #
  by SHIBATA Hiroshi.
* Update vendored Molinillo to 0.5. for performance improvements.
  Pull request # by Samuel Giddins.

Bug fixes:

* Raise an explicit error if Signer#sign is called with no certs. Pull
  request # by Daniel Berger.
* Update `update_bundled_ca_certificates` utility script for directory
  nesting. Pull request # by James Wen.
* Fix broken symlink support in tar writer (+ fix broken test). Pull
  request # by Cezary Baginski.
* Remove extension directory before (re-)installing. Pull request #
  by Jeremy Hinegardner.
* Regenerate test CA certificates with appropriate extensions. Pull
  request # by rhenium.
* Rubygems does not terminate on failed file lock when not superuser. Pull
  request # by Ellen Marie Dash.
* Fix tar headers with a  character name. Pull request # by Paweł
  Tomulik.
* Add Gem.platform_defaults to allow implementations to override defaults.
  Pull request # by Charles Oliver Nutter.
* Run Bundler tests on TravisCI. Pull request # by Samuel Giddins.

=== 2.6. / --

Minor enhancements:

* Use Gem::Util::NULL_DEVICE instead of hard coded strings. Pull request #
  by Chris Charabaruk.
* Use File.symlink on MS Windows if supported. Pull request #
  by Nobuyoshi Nakada.

Bug fixes:

* Redact uri password from error output when gem fetch fails. Pull request
  # by Brian Fletcher.
* Suppress warnings. Pull request # by Nobuyoshi Nakada.
* Escape user-supplied content served on web pages by `gem server` to avoid
  potential XSS vulnerabilities. Samuel Giddins.

=== 2.6. / --

Minor enhancements:

* Lazily calculate Gem::LoadError exception messages. Pull request #
  by Aaron Patterson.
* New fastly cert. Pull request # by David Radcliffe.
* Organize and cleanup SSL certs. Pull request # by James Wen.
* [RubyGems] Make deprecation message for paths= more helpful. Pull
  request # by Samuel Giddins.
* Show default gems when using "gem list". Pull request # by Luis
  Sagastume.

Bug fixes:

* Stub ordering should be consistent regardless of how cache is populated.
  Pull request # by Aaron Patterson.
* Handle cases when the @@stubs variable contains non-stubs. Pull request
  # by Per Lundberg.
* Fix test on Windows for inconsistent temp path. Pull request # by
  Hiroshi Shirosaki.
* Fix `Gem.find_spec_for_exe` picks oldest gem. Pull request # by
  Shinichi Maeshima.
* [Owner] Fallback to email and userid when owner email is missing. Pull
  request # by Samuel Giddins.
* [Installer] Handle nil existing executable. Pull request # by Samuel
  Giddins.
* Allow two digit version numbers in the tests. Pull request # by unak.

=== 2.6. / --

Bug fixes:

* Fix wrong version of gem activation for bin stub. Pull request # by
  Aaron Patterson.
* Speed up gem activation failures. Pull request # by Aaron Patterson.
* Fix platform sorting in the resolver. Pull request # by Samuel E.
  Giddins.
* Ensure we unlock the monitor even if try_activate throws. Pull request
  # by Charles Oliver Nutter.

=== 2.6. / --

Bug fixes:

* Ensure `default_path` and `home` are set for paths. Pull request #
  by Aaron Patterson.
* Restore but deprecate support for Array values on `Gem.paths=`. Pull
  request # by Aaron Patterson.
* Fix invalid gem file preventing gem install from working. Pull request
  # by Luis Sagastume.

=== 2.6. / --

Minor enhancements:

* RubyGems now defaults the `gem push` to the gem's "allowed_push_host"
  metadata setting.  Pull request # by Josh Lane.
* Update bundled Molinillo to 0.4.. Pull request # by Samuel E. Giddins.
* Add version option to gem open command. Pull request # by Hrvoje
  Šimić.
* Feature/add silent flag. Pull request # by Luis Sagastume.
* Allow specifying gem requirements via env variables. Pull request #
  by Samuel E. Giddins.

Bug fixes:

* RubyGems now stores `gem push` credentials under the host you signed-in for.
  Pull request # by Josh Lane.
* Move `coding` location to first line. Pull request # by SHIBATA
  Hiroshi.
* [PathSupport] Handle a regexp path separator. Pull request # by
  Samuel E. Giddins.
* Clean up the PathSupport object. Pull request # by Aaron Patterson.
* Join with File::PATH_SEPARATOR in Gem.use_paths. Pull request # by
  Samuel E. Giddins.
* Handle when the gem home and gem path arent set in the config file. Pull
  request # by Samuel E. Giddins.
* Terminate TimeoutHandler. Pull request # by Nobuyoshi Nakada.
* Remove redundant cache. Pull request # by Eileen M. Uchitelle.
* Freeze `Gem::Version@segments` instance variable. Pull request # by
  Ben Dean.
* Gem cleanup is trying to uninstall gems outside GEM_HOME and reporting
  an error after it tries. Pull request # by Luis Sagastume.
* Avoid duplicated sources. Pull request # by Luis Sagastume.
* Better description for quiet flag. Pull request # by Luis Sagastume.
* Raise error if find_by_name returns with nil. Pull request # by
  Zoltán Hegedüs.
* Find_files only from loaded_gems when using gemdeps. Pull request #
  by Michal Papis.

=== 2.5. / --

Bug fixes:

* Fix memoization of Gem::Version#prerelease? Pull request # by Matijs van
  Zuijlen.
* Handle trailing colons in GEM_PATH, by Damien Robert.
* Improve the Gemfile `gemspec` method, fixing # and #. Pull request
  # by Michael Papis.
* Warn only once when a gemspec license is invalid. Pull request # by Samuel

  E. Giddins.
* Check for exact constants before using them, fixing Ruby bug #. Pull
  request # by Nobuyoshi Nakada.
* Fix building C extensions on Ruby 1.9.x on Windows. Pull request # by Mari
e
  Markwell.
* Handle symlinks containing ".." correctly. Pull request # by Samuel E.
  Giddins.

Minor enhancements:

* Add `--no-rc` flag, which skips loading `.gemrc`. Pull request # by Luis
  Sagastume.
* Allow basic auth to be excluded from `allowed_push_host`. By Josh Lane.
* Add `gem list --exact`, which finds gems by string match instead of regex. Pul
l
  request # by Luis Sagastume.
* Suggest alternatives when gem license is unknown. Pull request # by Samuel

  E. Giddins.
* Print a useful error if a binstub expects a newer version of a gem than is
  installed. Pull request # by Samuel E. Giddins.
* Allow the (supported) s3:// scheme to be used with `--source`. Pull request
  # by Dave Adams.
* Add `--[no-]post-install-message` to `install` and `update`. Pull request #

  by Josef Šimánek.
* Add `--host` option to `yank`, providing symmetry with `pull`. Pull request
  # by Mike Virata-Stone.
* Update bundled Molinillo to 0.4.. Pull request # by Samuel E. Giddins.
* Allow calling `build` without '.gemspec'. Pull request # by Stephen
  Blackstone.
* Add support for `source` option on gems in Gemfile. Pull request # by
  Michael Papis.
* Function correctly when string literals are frozen on Ruby 2.3. Pull request
  # by Samuel E. Giddins.

------------------------------------------------------------------------------

RubyGems installed the following executables:
        C:/RailsInstaller/Ruby2.3.0/bin/gem

Ruby Interactive (ri) documentation was installed. ri is kind of like man
pages for ruby libraries. You may access it like this:
  ri Classname
  ri Classname.class_method
  ri Classname#instance_method
If you do not wish to install this documentation in the future, use the
--no-document flag, or set it as the default in your ~/.gemrc file. See
'gem help env' for details.

RubyGems system software updated

C:\Sites\test01>gem -v
2.6.