これは…面倒な…ことに…なった…
~/live$ bundle install
Could not reach host index.rubygems.org. Check your network connection and try
again.
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@mayaeh you can switch to a bundler mirror temporarily, and switch back at any time:
bundle config mirror.https://rubygems.org https://gems.ruby-china.com
(Most of us Chinese developers are using this mirror)
@mashiro thank you!