On Linux, to install Ruby gems via a HTTP proxy. simply set the HTTP_PROXY (all upper case) environment variable to point to the proxy. For example: export HTTP_PROXY=http://my.proxy.server:port/ gem install sproutcore Update: Brat points out that FTP_PROXY may also be required for FTP access. For example: export FTP_PROXY=http://my.proxy.server:port/
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