Ubuntu通過終端命令行換阿里源

1. 檢查Ubuntu系統的Codename

   $ lsb_release -a
   

   得到結果:

   No LSB modules are available.
   Distributor ID: Ubuntu
   Description:    Ubuntu 18.04.2 LTS
   Release:        18.04
   Codename:       bionic
   

   訪問http://mirrors.aliyun.com/ubuntu/dists/查看阿里源是否支持

2. 修改sources.list

   $ sudo vi /etc/apt/sources.list
   

   刪除sources.list中原有的內容，更換為阿里源

   deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
   deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
   deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
   deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
   deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
   deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
   deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
   deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
   deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
   deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
   

   注意此處每一行的bionic都需要與系統的Codename相對應，因此不同系統版本間的sources.list文件不能通用

3. 更新yuan

   $ sudo apt-get update
   

4. 更新軟件

   $ sudo apt-get upgrade