How can I download gdb on zorin os 18?

[Forpli]

It is difficult for me to compare at the moment because I'm not at the computer.
Here you can see a thread with the file to compare:

Sources.list File in Zorin 18

Hello Ladies and Gentlemen! Could someone post the Content of the sources.list File from /etc/apt/ with ''Main Server'' set in Software & Updates please? I want double-check something.