本文提供了一种解决在Ubuntu系统中遇到的更新错误的方法。当出现“无法获取锁/var/lib/dpkg/lock-frontend”时，可以通过删除特定锁定文件来解决此问题。具体步骤包括使用sudo权限移除/var/lib/apt/lists/lock、/var/cache/apt/archives/lock及/var/lib/dpkg/lock等文件。
E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 3076 (unattended-upgr)
解决办法：
sudo rm /var/lib/apt/lists/lock
sudo rm /var/cache/apt/archives/lock
sudo rm /var/lib/dpkg/lock
参考：
https://unix.stackexchange.com/questions/374748/ubuntu-update-error-waiting-for-unattended-upgr-to-exit
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