akio0911回答ポイント 60ptウォッチ

Rubyを使用しています。

sudoしたら$:の中身が変わってしまいます。
何故なのか教えて下さい。

Macintosh:~ user$ ruby -e 'p $:'
["/opt/local/lib/ruby/gems/gems/sources-0.0.1/lib", "/opt/local/lib/ruby/site_ruby/1.8", "/opt/local/lib/ruby/site_ruby/1.8/i686-darwin9.1.0", "/opt/local/lib/ruby/site_ruby", "/opt/local/lib/ruby/vendor_ruby/1.8", "/opt/local/lib/ruby/vendor_ruby/1.8/i686-darwin9.1.0", "/opt/local/lib/ruby/vendor_ruby", "/opt/local/lib/ruby/1.8", "/opt/local/lib/ruby/1.8/i686-darwin9.1.0", "."]
Macintosh:~ user$ sudo ruby -e 'p $:'
["/opt/local/lib/ruby/site_ruby/1.8", "/opt/local/lib/ruby/site_ruby/1.8/i686-darwin9.1.0", "/opt/local/lib/ruby/site_ruby", "/opt/local/lib/ruby/vendor_ruby/1.8", "/opt/local/lib/ruby/vendor_ruby/1.8/i686-darwin9.1.0", "/opt/local/lib/ruby/vendor_ruby", "/opt/local/lib/ruby/1.8", "/opt/local/lib/ruby/1.8/i686-darwin9.1.0", "."]
Macintosh:~ user$ echo $RUBYLIB
/opt/local/lib/ruby/gems/gems/sources-0.0.1/lib
Macintosh:~ user$ sudo echo $RUBYLIB
/opt/local/lib/ruby/gems/gems/sources-0.0.1/lib