1.更新源的步骤 (1)备份原来的源列表文件 cd /etc/apt/ mv sources.list sources.list.bak (2)新建源文件,输入源地址 nano sources.list 在nano sources.list输入如下源地址 deb http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse 然后按ctrl+o保存,然后ctrl+x退出 (3)删除旧的源文件 rm /var/lib/apt/lists/* rm /var/lib/apt/lists/partial/* (4)最后更新源文件 apt-get update 到此更新源成功