chmod: cannot access '/home/u202220081001069/.dpkg.cfg': Permission denied

This error message means that you do not have the necessary permissions to access the file "/home/u202220081001069/.dpkg.cfg".

To resolve this issue, you can try running the "chmod" command as the superuser or root user. Here's an example:

sudo chmod 644 /home/u202220081001069/.dpkg.cfg

This command sets the file permissions to allow read and write access for the owner of the file, and read-only access for everyone else.

Alternatively, you can try changing the ownership of the file to your user account by running the following command:

sudo chown your_username:your_username /home/u202220081001069/.dpkg.cfg

Replace "your_username" with your actual username. This command changes the ownership of the file to your user account, allowing you to modify it.