apt-get无法使用

      

       使用虚拟机安装Ubuntu14.04后使用apt-get 装软件提示unable locate package,网上有的说apt-get update一下就好了，还有的说要删除一些文件，但是尝试后没用，需编辑/etc/apt/source_list将源修改。首先cp /etc/apt/source_list /etc/apt/source_list.bak进行备份，然后将原来文件内容替换为以下国内的源，速度也很不错，我使用了官方源。在更改了源后，能使用apt-cache search了，但是还是不能进行安装，再次百度后，发现将以下的源放在原有的源的前面，在重新进行更新以下就行了。

官方源：

deb http://archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse

deb http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse

163源：

deb http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse

deb http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse

deb http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse

deb http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse

deb-src http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse

deb-src http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse

deb-src http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse

deb-src http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse

deb-src http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse

阿里源：

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

centos源（放心使用）：

deb http://centos.bitcomm.cn/ubuntu trusty main restricted universe multiverse

deb http://centos.bitcomm.cn/ubuntu trusty-security main restricted universe multiverse

deb http://centos.bitcomm.cn/ubuntu trusty-updates main restricted universe multiverse

deb http://centos.bitcomm.cn/ubuntu trusty-backports main restricted universe multiverse

deb http://centos.bitcomm.cn/ubuntu trusty-proposed main restricted universe multiverse

deb-src http://centos.bitcomm.cn/ubuntu trusty main restricted universe multiverse

deb-src http://centos.bitcomm.cn/ubuntu trusty-security main restricted universe multiverse

deb-src http://centos.bitcomm.cn/ubuntu trusty-updates main restricted universe multiverse

deb-src http://centos.bitcomm.cn/ubuntu trusty-backports main restricted universe multiverse

deb-src http://centos.bitcomm.cn/ubuntu trusty-proposed main restricted universe multiverse

搜狐源：

deb http://mirrors.sohu.com/ubuntu/ trusty main restricted universe multiverse

deb http://mirrors.sohu.com/ubuntu/ trusty-security main restricted universe multiverse

deb http://mirrors.sohu.com/ubuntu/ trusty-updates main restricted universe multiverse

deb http://mirrors.sohu.com/ubuntu/ trusty-proposed main restricted universe multiverse

deb http://mirrors.sohu.com/ubuntu/ trusty-backports main restricted universe multiverse

deb-src http://mirrors.sohu.com/ubuntu/ trusty main restricted universe multiverse

deb-src http://mirrors.sohu.com/ubuntu/ trusty-security main restricted universe multiverse

deb-src http://mirrors.sohu.com/ubuntu/ trusty-updates main restricted universe multiverse

deb-src http://mirrors.sohu.com/ubuntu/ trusty-proposed main restricted universe multiverse

deb-src http://mirrors.sohu.com/ubuntu/ trusty-backports main restricted universe multiverse

然后执行apt-get update就行了！