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sudo -icd /etc/aptwget http://mirrors.163.com/.help/sources.list.trustymv sources.list sources.list.backupmv sources.list.trusty sources.listapt-get update#apt-get dist-upgrade
Ubuntu 更换软件源sources.list
原文地址：http://www.cnblogs.com/wuyuntao/p/4876773.html
