Ubuntu20下更改apt源为阿里云源

# Ubuntu20下更改apt源为阿里云源
前言：Win10的wsl系统下下来尝鲜，发现没法apt install zabbix.
就琢磨尝试把Ubuntu20的apt源做下更改。
参考链接：https://blog.csdn.net/zhangjiahao14/article/details/80554616
## 查看操作系统版本
lsb_release -c

lsb_release -c
Codename: focal

focal应该是ubuntu20.04（LTS）的代号。
## 备份

sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak.20200504

## 编辑源列表文件
sudo vim /etc/apt/sources.list
更新内容如下

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

## 更新软件列表
sudo apt-get update
## 更新软件
sudo apt-get upgrade
## 附上更新的成果
apt list|grep zabbix

 # apt list|grep zabbix
WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
pcp-export-zabbix-agent/bionic 4.0.1-1 amd64
zabbix-agent/bionic 1:3.0.12+dfsg-1 amd64
zabbix-cli/bionic 1.7.0-1 all
zabbix-frontend-php/bionic 1:3.0.12+dfsg-1 all
zabbix-java-gateway/bionic 1:3.0.12+dfsg-1 all
zabbix-proxy-mysql/bionic 1:3.0.12+dfsg-1 amd64
zabbix-proxy-pgsql/bionic 1:3.0.12+dfsg-1 amd64
zabbix-proxy-sqlite3/bionic 1:3.0.12+dfsg-1 amd64
zabbix-server-mysql/bionic 1:3.0.12+dfsg-1 amd64
zabbix-server-pgsql/bionic 1:3.0.12+dfsg-1 amd64