1.軟件下載源的配置文件的路徑：/etc/apt/sources.list

2.添加下載源地址

（1）打開“Software&Updates”。直接雙擊“sources.list”文件也可以打開“Software&Updates”。顯示對話框如下所示。

（2）點擊“Other Software”->“Add...”，打開對話框如下。

（3）將需要添加的下載源地址添加到“APT line”中，點擊“Add Source”。

3.更新源列表

sudo apt-get update

sudo apt-get upgrade

附件：從網絡中收集的下載源地址：

#tsing hua mirror site

1. deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main multiverse restricted universe

2. deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main multiverse restricted universe

3. deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-proposed main multiverse restricted universe

4. deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main multiverse restricted universe

5. deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main multiverse restricted universe

6. deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main multiverse restricted universe

7. deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main multiverse restricted universe

8. deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-proposed main multiverse restricted universe

9. deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main multiverse restricted universe

10. deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main multiverse restricted universe

#163 mirror site

1. deb http://mirrors.163.com/debian/ lenny main contrib non-free

2. deb-src http://mirrors.163.com/debian lenny main contrib non-free

3. deb http://mirrors.163.com/debian-security/ stable/updates main

4. deb-src http://mirrors.163.com/debian-security/ stable/updates main

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

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

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

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

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

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

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

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

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

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

15. 
    

#official mirror site

deb http://ftp.debian.org/debian/ lenny main contrib non-free

deb-src http://ftp.debian.org/debian/ lenny main contrib non-free

deb http://ftp.us.debian.org/debian/ lenny main contrib non-free

deb-src http://ftp.us.debian.org/debian/ lenny main contrib non-free

deb http://security.debian.org/ stable/updates main

deb-src http://security.debian.org/ stable/updates main

deb http://volatile.debian.org/debian-volatile stable/volatile main

deb-src http://volatile.debian.org/debian-volatile stable/volatile main

# ustc debian-multimedia

deb http://debian.ustc.edu.cn/debian-multimedia/ stable main

deb-src http://debian.ustc.edu.cn/debian-multimedia/ stable main

# ustc debian-security

deb http://debian.ustc.edu.cn/debian-security/ stable/updates main non-free contrib

deb-src http://debian.ustc.edu.cn/debian-security/ stable/updates main non-free contrib

配置Linux軟件下載源（Ubuntu）