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The error message is actually giving you the exact command you need to fix the issue. However, just typing it in sometimes isn't enough if there are other locks on the system.
The error message itself provides the primary solution. Open your terminal and execute: sudo dpkg --configure -a Use code with caution. Copied to clipboard
ps aux | grep -E 'apt|dpkg|apt-get|unattended-upgrade' | grep -v grep
sudo kill -9 [PID_NUMBER]
If you encounter stubborn lock files or a failing post-installation script, the advanced methods outlined above will restore your package manager without requiring a full system reinstall.
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