1、导入仓库密匙

sudo wget -O - http://package.elementaryos.cn/bionic/key/package.gpg.key | sudo apt-key add -

2、打开文件

sudo io.elementary.code /etc/apt/sources.list
## 修改为中文源
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
## 末尾添加
deb http://package.elementaryos.cn/bionic/ bionic main 

3、更新软件包缓存

sudo apt update

4、系统更新

sudo apt upgrade进行

5、常用工具

！这里还是推荐大家能deb包安装自行安装

elementary-tweaks   配置工具（测试5.1系统闪退，参考另一篇文章。）
wingpanel-indicator-ayatana     第三方应用状态栏图标修复，安装后重启
deepin.cn.360.yasuo360      压缩
deepin.cn.com.winrar    WinRAR
deepin.com.baidu.pan    百度网盘(wine)
baidunetdisk    百度网盘(原生)
deepin.com.foxmailFoxmail       邮件客户端
deepin.com.qq.imQQ
deepin.com.taobao.wangwang      阿里旺旺
deepin.com.thunderspeed     迅雷
deepin.com.wechat.devtools      微信开发者工具
deepin.com.wechat       微信
deepin.com.weixin.work      企业微信
deepin.org.7-zip    7-Zip
deepin.org.foobar2OOO       foobar2000
electron-ssr        酸酸乳
navicat     Navicat数据库管理客户端
netease-cloud-music     网易云音乐
sogoupinyin     搜狗拼音输入法
wps-office      WPS
motrix      motrix下载软件
anydesk     anydesk跨平台远程协助软件
symbol-fonts        WPS 字体修复