如何阻止apt执行任何操作？嵌入式Linux磁盘占用异常求助

Got it, let's tackle this problem head-on. The disk usage creep you're seeing is almost certainly caused by apt's automatic update services quietly downloading package updates to your cache directory (/var/cache/apt/archives/) in the background. Since you don't need any updates at all, we can completely disable all of apt's automatic update-related behavior with these steps:

1. Stop and Disable APT's Systemd Services/Timers #

APT relies on systemd timers and background services to trigger automatic updates. We need to stop, disable, and mask these components to ensure they never run again:

• First, stop any currently running update services:

  sudo systemctl stop apt-daily.service apt-daily-upgrade.service
  

• Disable them so they won't start on system boot:

  sudo systemctl disable apt-daily.service apt-daily-upgrade.service
  

• Stop and disable the timers that trigger these services periodically:

  sudo systemctl stop apt-daily.timer apt-daily-upgrade.timer
  sudo systemctl disable apt-daily.timer apt-daily-upgrade.timer
  

• Mask the services and timers to block any other system processes from triggering them:

  sudo systemctl mask apt-daily.service apt-daily-upgrade.service
  sudo systemctl mask apt-daily.timer apt-daily-upgrade.timer
  

2. Modify APT's Core Automatic Update Config #

Next, we'll edit the config file that controls apt's periodic update behavior:

• Open the config file with a simple editor like nano:

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

• Set both values to 0 to disable package list updates and unattended upgrades entirely:

  APT::Periodic::Update-Package-Lists "0";
  APT::Periodic::Unattended-Upgrade "0";
  

• Save and exit (in nano: press Ctrl+O, hit Enter, then Ctrl+X).

3. Clean Up Existing Cache (Optional but Recommended) #

You already know this trick, but let's formalize it: run this command to clear all downloaded package cache and reclaim your disk space right away:

sudo apt-get clean

If you only want to remove outdated packages from the cache, use sudo apt-get autoclean instead—but clean will wipe the entire cache completely, which is ideal for your use case.

4. Verify the Changes #

To confirm nothing is still scheduled to run, check for any remaining apt-related timers:

systemctl list-timers *apt*

If the output shows no active timers, you've successfully disabled all automatic apt update operations. Your disk usage should no longer creep up due to background apt activities.

内容的提问来源于stack exchange，提问作者Zephyr