ERROR: While executing gem ... (Gem::RemoteFetcher::FetchError)
bad response Not Found 404 (https://gems.ruby-china.org/specs.4.8.gz)
去https://gems.ruby-china.org看了眼,显示:
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1.$ gem sources --remove https://gems.ruby-china.org
2.$ gem sources -a https://gems.ruby-china.com
3.$ gem sources -l
https://gems.ruby-china.com
4.$ sudo gem update --system
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