ubuntu18.04如何更新软件源（切换为国内软件源）

ubuntu18.04如何更新软件源（切换为国内软件源）
Ubuntu系统18.04，在安装开发环境命令sudo apt update, sudo apt install build-essential时，进行软件更新的时候会发现速度非常的慢，这是因为软件源使用的是国外源的原因，使用国内的软件源在软件下载速度方面相对比较快。

具体操作方法如下：

1、使用快捷键【ctrl+alt+t】打开终端。

2、输入以下命令备份原有软件源文件。

cp /etc/apt/sources.list /etc/apt/sources.list.bak_yyyymmdd

3、再输入以下命令打开sources.list文件并添加新的软件源地址。

sudo vi /etc/apt/sources.list      #打开sources.list文件

编辑/etc/apt/sources.list文件, 在文件最前面添加阿里云镜像源：

1. #阿里源地址
   
2. deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
   
3. deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
   
4. deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
   
5. deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
   
6. deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
   
7. deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
   
8. deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
   
9. deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
   
10. deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
    
11. deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

复制代码

其它源：

#中科大源地址
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse

#163源地址
deb http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse

#清华源地址
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse

4、最后输入命令更新系统软件源地址即可。
更新软件列表，运行如下命令：
sudo apt-get update

更新软件包，运行如下命令：
sudo apt-get upgrade