一招解决 ubuntu apt 命令被锁定

问题背景

玩了个国外老版本服务器，ubuntu20的，结果触发自动更新。 cpu都跑炸了,而且一直100%，主要是不让我安装东西

root@kuibatian:~# sudo apt install screen Reading package lists… Done Building dependency tree
Reading state information… Done The following packages were automatically installed and are no longer required: libllvm11 linux-headers-5.8.0-43-generic linux-hwe-5.8-headers-5.8.0-43 linux-image-5.8.0-43-generic linux-modules-5.8.0-43-generic linux-modules-extra-5.8.0-43-generic Use ‘sudo apt autoremove’ to remove them. The following additional packages will be installed: libutempter0 Suggested packages: byobu | screenie | iselect E: Could not get lock /var/cache/apt/archives/lock. It is held by process 3625 (unattended-upgr) N: Be aware that removing the lock file is not a solution and may break your system. E: Unable to lock directory /var/cache/apt/archives/

解决

这个问题是由于系统自动更新进程（unattended-upgrades）正在运行，导致 apt 命令被锁定。以下是解决方案：

1. 暂时停止自动更新服务

# 停止 unattended-upgrades 服务
sudo systemctl stop unattended-upgrades

# 禁用自动更新
sudo systemctl disable unattended-upgrades

2. 删除锁文件

# 删除 apt 锁文件
sudo rm /var/cache/apt/archives/lock
sudo rm /var/lib/dpkg/lock
sudo rm /var/lib/dpkg/lock-frontend

3. 修复 dpkg

# 尝试修复可能的依赖问题
sudo dpkg --configure -a

4. 清理过时的内核和包

# 清理不再需要的包
sudo apt autoremove

# 清理 apt 缓存
sudo apt clean

5. 重新尝试安装 screen

# 更新包列表
sudo apt update

# 安装 screen
sudo apt install screen

6. 长期解决方案

配置自动更新时间

编辑 /etc/apt/apt.conf.d/20auto-upgrades：

sudo nano /etc/apt/apt.conf.d/20auto-upgrades

修改为：

APT::Periodic::Update-Package-Lists "1";
APT::Periodic::Download-Upgradeable-Packages "1";
APT::Periodic::AutocleanInterval "7";
APT::Periodic::Unattended-Upgrade "1";

设置更新时间

编辑 /etc/apt/apt.conf.d/10periodic：

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

确保配置如下：

APT::Periodic::Update-Package-Lists "1";
APT::Periodic::Download-Upgradeable-Packages "1";
APT::Periodic::AutocleanInterval "7";
APT::Periodic::Unattended-Upgrade "1";

7. 验证安装

# 检查 screen 是否成功安装
screen --version

注意事项

• 谨慎删除锁文件
• 建议在系统负载低时进行这些操作
• 如果问题持续存在，可能需要重启系统

额外的诊断命令

# 查看自动更新服务状态
systemctl status unattended-upgrades

# 查看系统日志
journalctl -u unattended-upgrades

这些步骤应该能帮助你解决 apt 被锁定的问题

执行图片

cpu 变小了

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