Ubuntu18.04 更换源

在虚拟机新建一个Ubuntu18.04.1-live-server-amd64当做服务器

在安装软件时报错：

slave@slave:~$ sudo -s
[sudo] password for slave:

root@slave:~# apt install redis-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
python3 is already the newest version (3.6.5-3ubuntu1).
0 upgraded, 0 newly installed, 0 to remove and 27 not upgraded.

root@slave:~# apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 27 not upgraded.　

从报错信息上看可能存在一些依赖问题或者软件源出了问题，修复一下破损的依赖关系还是一样的错误信息，此时应该更换Ubuntu的源。

如何更换Ubuntu的源

①进入root模式

sudo -s

②进入ubuntu源的目录　

cd /etc/apt

③备份sources.list

cp sources.list sources.list.bak

④修改sources.list

删除sources.list中的内容，把阿里云的源复制进source.list中

vi sources.list

ubuntu 18.04(bionic)

阿里云：

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

　　

⑤ 更新源

apt update

　　

6. 更新软件

apt upgrade

　　

再次安装软件就不会报错了