关闭Ubuntu系统更新方法

1、在设置中如下操作

 

 2、打开文件进行如下操作

sudo vim /etc/apt/apt.conf.d/10periodic

修改所有参数为0

APT::Periodic::Update-Package-Lists "0";
APT::Periodic::Download-Upgradeable-Packages "0";
APT::Periodic::AutocleanInterval "0";
APT::Periodic::Unattended-Upgrade "0";