shell使用http代理
export http_proxy='http://192.168.2.2:1080'
export https_proxy='http://192.168.2.2:1080'
export ftp_proxy='http://192.168.2.2:1080'
export http_proxy='http://192.168.2.2:1080'
export https_proxy='http://192.168.2.2:1080'
export ftp_proxy='http://192.168.2.2:1080'