April 18, 2019, Ubuntu 19.04 Ubuntu 19.04 official release of Codename is "disco (disco).":
zkf@ubuntu:~$ lsb_release -c
Codename: disco
For the convenience of users using the latest version of Ubuntu 19.04, Ubuntu domestic paper provides an update source 19.04 and complete the steps to change the update source.
Update the source files into the directory:
cd /etc/apt/
Backup original update source file:
sudo cp -p sources.list sources.list.bak
Edit update source file:
sudo we sources.list
Domestic write the following update sources:
#阿里云源 deb http://mirrors.aliyun.com/ubuntu/ disco main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ disco main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ disco-security main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ disco-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ disco-updates main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ disco-updates main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ disco-backports main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ disco-backports main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ disco-proposed main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ disco-proposed main restricted universe multiverse #中科大源 deb https://mirrors.ustc.edu.cn/ubuntu/ disco main restricted universe multiverse deb-src https://mirrors.ustc.edu.cn/ubuntu/ disco main restricted universe multiverse deb https://mirrors.ustc.edu.cn/ubuntu/ disco-updates main restricted universe multiverse deb-src https://mirrors.ustc.edu.cn/ubuntu/ disco-updates main restricted universe multiverse deb https://mirrors.ustc.edu.cn/ubuntu/ disco-backports main restricted universe multiverse deb-src https://mirrors.ustc.edu.cn/ubuntu/ disco-backports main restricted universe multiverse deb https://mirrors.ustc.edu.cn/ubuntu/ disco-security main restricted universe multiverse deb-src https://mirrors.ustc.edu.cn/ubuntu/ disco-security main restricted universe multiverse deb https://mirrors.ustc.edu.cn/ubuntu/ disco-proposed main restricted universe multiverse deb-src https://mirrors.ustc.edu.cn/ubuntu/ disco-proposed main restricted universe multiverse #163源 deb http://mirrors.163.com/ubuntu/ disco main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ disco-security main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ disco-updates main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ disco-proposed main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ disco-backports main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ disco main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ disco-security main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ disco-updates main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ disco-proposed main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ disco-backports main restricted universe multiverse #清华源 deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco main restricted universe multiverse deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco main restricted universe multiverse deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-updates main restricted universe multiverse deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-updates main restricted universe multiverse deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-backports main restricted universe multiverse deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-backports main restricted universe multiverse deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-security main restricted universe multiverse deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-security main restricted universe multiverse deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-proposed main restricted universe multiverse deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ disco-proposed main restricted universe multiverse
Update the system:
sudo apt-get update sudo apt-get upgrade