禁用Ubuntu 22.04自动更新

禁用无人值守自动更新（unattended-upgrades）这是Ubuntu默认负责后台自动更新的核心组件，先把它彻底关掉：编辑自动更新配置文件：sudo nano /etc/apt/apt.conf.d/20auto-upgrades将文件内的两个配置值修改为0，彻底关闭自动更新检查和升级：APT::Periodic::Update-Package-Lists "0"; APT::Periodic::Unattended-Upgrade "0";保存并退出编辑器（按Ctrl+O确认保存，回车后按Ctrl+X退出）停止、禁用并锁定该服务，防止它被意外启动：sudo systemctl stop unattended-upgrades sudo systemctl disable unattended-upgrades sudo systemctl mask unattended-upgrades禁用APT每日更新定时服务Ubuntu还有两个定时服务apt-daily和apt-daily-upgrade，会定期触发更新检查，同样需要禁用：# 停止并禁用定时任务 sudo systemctl stop apt-daily.timer apt-daily-upgrade.timer sudo systemctl disable apt-daily.timer apt-daily-upgrade.timer sudo systemctl mask apt-daily.timer apt-daily-upgrade.timer # 停止并禁用对应的服务单元 sudo