Can no longer use sudo apt update. Running 20.04

Solution 1:

You have several issues here with third-party repositories with your Ubuntu 21.04.
To fix them:

1. Disable PPAs:

   sudo add-apt-repository -r ppa:boost-latest/ppa
   sudo add-apt-repository -r ppa:jonathonf/wine
   

2. To disable https://packages.sury.org/php you have to locate its file using grep -r packages.sury.org /etc/apt --include=*.list.

   In your case run:

   sudo nano /etc/apt/sources.list.d/php.list
   

   and place # at the line deb packages.sury.org/php hirsute main, then press Ctrl+O for save, Ctrl+x to close.

3. Restore normal default repositories - place the following into /etc/apt/sources.list:

   deb http://archive.ubuntu.com/ubuntu/ hirsute main universe multiverse restricted
   deb http://archive.ubuntu.com/ubuntu/ hirsute-updates main multiverse universe restricted
   deb http://archive.ubuntu.com/ubuntu/ hirsute-security main universe multiverse restricted
   

   replacing lines with digitalocean.

4. Run sudo apt-get update .

5. Install Wine from official repositories as it was planned by

   sudo add-apt-repository universe
   sudo rm /etc/apt/sources.list.d/archive_uri* # we remove winehq here
   sudo dpkg --add-architecture i386
   sudo apt-get update
   sudo apt install wine64 wine32:i386