(16.04+ ) Which software sources has ALL dbg packages?

[myocytebd2]

For example, mesa debug symbol packages
https://launchpad.net/ubuntu/zesty/+...l1-mesa-dbgsym
no longer can not be found by "apt cache search" since 16.04+ .

Which source hosts these packages?

[ian-weisser]

Instead of a 'foo-debug' package, look for the 'foo.ddeb' package. That's right '.ddeb' instead of .deb
These packages are hosted in Launchpad and in a separate repo..

Explanation: https://askubuntu.com/questions/7648...-file-in-linux
Ubuntu instructions: https://wiki.ubuntu.com/Debug%20Symbol%20Packages

[mc4man]

You could read here but the instructions, while correct are initially presented in poor fashion. Copy the whole 1st. command after toggling off the line numbers
https://wiki.ubuntu.com/Debug%20Symbol%20Packages

The commands would be more like this -

echo "deb http://ddebs.ubuntu.com $(lsb_release -cs) main restricted universe multiverse
deb http://ddebs.ubuntu.com $(lsb_release -cs)-updates main restricted universe multiverse
deb http://ddebs.ubuntu.com $(lsb_release -cs)-proposed main restricted universe multiverse" | \
sudo tee -a /etc/apt/sources.list.d/ddebs.list

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 428D7C01 C8CAB6595FDFF622

sudo apt update

Note that this also adds the ddebs for proposed, you may or may not want that..., can be removed from command or the /etc/apt/sources.list.d/ddebs.list file if desired.