2019年4月18日, Ubuntu 19.04 正式发布. Ubuntu 19.04 的 Codename 是"disco(迪斯科舞厅)":
zkf@ubuntu:~$ lsb_release -c
Codename: disco
为了方便国内用户使用最新版的 Ubuntu 19.04, 本文提供了 Ubuntu 19.04 的国内更新源以及更改更新源的完整步骤.
进入更新源文件所在目录:
cd /etc/apt/
备份原有更新源文件:
sudo cp -p sources.list sources.list.bak
编辑更新源文件:
sudo vi sources.list
写入如下国内更新源:
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更新系统:
sudo apt-get update sudo apt-get upgrade
原文：https://www.cnblogs.com/surplus/p/11420307.html