1. Backup system comes with source
MV /etc/apt/sources.list/etc/apt/sources.list.bak
2. Modify the/etc/apt/sources.list file
Vim/etc/apt/sources.list
Add the following:
1DEB-SRC http://archive.ubuntu.com/ubuntu xenial main restricted #Added by Software-properties2Deb http://mirrors.aliyun.com/ubuntu/xenial main restricted3DEB-SRC http://mirrors.aliyun.com/ubuntu/xenial main restricted Multiverse Universe #Added by Software-properties4Deb http://mirrors.aliyun.com/ubuntu/xenial-updates main restricted5DEB-SRC http://mirrors.aliyun.com/ubuntu/xenial-updates main restricted Multiverse Universe #Added by Software-properties6Deb http://Mirrors.aliyun.com/ubuntu/xenial Universe7Deb http://Mirrors.aliyun.com/ubuntu/xenial-updates Universe8Deb http://mirrors.aliyun.com/ubuntu/xenial Multiverse9Deb http://mirrors.aliyun.com/ubuntu/xenial-updates MultiverseTenDeb http://mirrors.aliyun.com/ubuntu/xenial-backports main restricted universe multiverse OneDEB-SRC http://mirrors.aliyun.com/ubuntu/xenial-backports main restricted universe Multiverse #Added by Software-properties ADeb http://Archive.canonical.com/ubuntu xenial Partner -DEB-SRC http://Archive.canonical.com/ubuntu xenial Partner -Deb http://mirrors.aliyun.com/ubuntu/xenial-security main restricted theDEB-SRC http://mirrors.aliyun.com/ubuntu/xenial-security main restricted Multiverse Universe #Added by Software-properties -Deb http://Mirrors.aliyun.com/ubuntu/xenial-security Universe -Deb http://mirrors.aliyun.com/ubuntu/xenial-security Multiverse
3. The update takes effect
Apt-get Update
Ubuntu16 Apt-get Change to Ali