替换gems默认源

gem sources #列出默认源 gem sources –remove https://rubygems.org/ #移除默认源 gem sources -a https://mirrors.ustc.edu.cn/rubygems/ #添加科大源



替换Rails默认源

cd path/to/your/project
#Linux only:
sed -i "/^source/c source 'http://mirrors.ustc.edu.cn/rubygems/'" Gemfile 
#OS X only:
sed -ig "s/^source.*/source 'http:\\/\\/mirrors.ustc.edu.cn\\/rubygems\\/'/g" Gemfile

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