[root@localhost frozen]# gem install sqlite3 -V
GET https://api.rubygems.org/latest_specs.4.8.gz
302 Moved Temporarily
ERROR: Could not find a valid gem 'sqlite3' (>= 0), here is why:
Unable to download data from https://rubygems.org/ - Errno::ECONNREFUSED: Connection refused - connect(2) (https://api.rubygems.org/latest_specs.4.8.gz)
GET https://api.rubygems.org/prerelease_specs.4.8.gz
302 Moved Temporarily
GET https://api.rubygems.org/specs.4.8.gz
302 Moved Temporarily
GET https://s3.amazonaws.com/production.s3.rubygems.org/specs.4.8.gz
200 OK
ERROR: Possible alternatives: sqlite3
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http://ruby.sdutlinux.org/ Mirror of Shandong University of Technology
It seems u 2 right. Try http://gems.gzruby.org/ .
Always use Taobao’s mirror source
https://ruby.taobao.org/