今天新裝的Ubuntu安裝軟件一直報錯Unable to locate package ****，原因Ubuntu apt軟件源有問題，更換為apt阿里云源解決問題。
1、備份apt源
1.1Ubuntu 的apt源配置文件：/etc/apt/sources.list，備份原來的源。
sudo mv /etc/apt/sources.list /etc/apt/sources.list.bak20181105
2、修改阿里云apt源配置內(nèi)容
2.1阿里源
deb-src http://archive.ubuntu.com/ubuntu xenial main restricted #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial universe
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates universe
deb http://mirrors.aliyun.com/ubuntu/ xenial multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse #Added by software-properties
deb http://archive.canonical.com/ubuntu xenial partner
deb-src http://archive.canonical.com/ubuntu xenial partner
deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial-security universe
deb http://mirrors.aliyun.com/ubuntu/ xenial-security multiverse
2.2修改/etc/apt/sources.list的內(nèi)容為2.1里面的內(nèi)容
sudo vim /etc/apt/sources.list
3應(yīng)用新源
修改源之后需要執(zhí)行命令更新，新源才能正常使用。
sudo apt-get update
