怎么修改ubuntu的软件源

ubuntu修改软件源的方法：1、打开终端；2、输入“sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup”命令备份源列表；3、输入“sudo vim /etc/apt/sources.list”命令打开sources.list文件进行修改；4、使用新的源替换掉文件中所有的内容；5、输入命令更新源列表，使修改生效即可。

具体操作步骤：

使用快捷键【Ctrl+Alt+T】打开终端。

输入以下命令备份源列表。

sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup

再输入命令打开sources.list文件进行修改。

sudo vim /etc/apt/sources.list

使用以下源替换掉文件中所有的内容，保存编辑好的文件。

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

最后输入以下命令更新源列表，使修改生效即可。

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install build-essential