Ubuntu 19.04 incorrect sources.list

Where can I find the sources list for 19.04?

Steps required:

• Run these commands in WSL console only. Otherwise, the file/folder permissions will be incorrect. Also, use chmod to correct any file permission.
• Open Ubuntu cloud image website: https://cloud-images.ubuntu.com/releases/19.04/release/
• Download the ubuntu-19.04-server-cloudimg-amd64-root.TAR.XZ file. Because it is smaller than others ;)
• Extract the /etc/apt folder with tar -xvf ubuntu-19.04-server-cloudimg-amd64-root.tar.xz etc/apt command. Do not add the leading slash in the folder path.
• Now copy the sources.list file or any other required files as you need.

If you just want to update your existing sources.list to point to the new distro after you've already upgraded, you can do this:

Warning: Tread carefully! Always backup your file first.

sudo sed -i "s/cosmic/$(lsb_release -cs)/" /etc/apt/sources.list

The form of the sed command is: "s/<old value>/<new value>/"

To backup your file first, you can simply do: sudo cp /etc/apt/sources.list ~/

You can also see this answer for an idea of what the sources.list should look like:

What is the correct output of cat /etc/apt/sources.list?

By following the @Biswaprio's answer, here I put the content of sources.list file for ubuntu 19.04 so that others don't need to go through the whole process again.

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://archive.ubuntu.com/ubuntu/ disco main restricted
# deb-src http://archive.ubuntu.com/ubuntu/ disco main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://archive.ubuntu.com/ubuntu/ disco-updates main restricted
# deb-src http://archive.ubuntu.com/ubuntu/ disco-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://archive.ubuntu.com/ubuntu/ disco universe
# deb-src http://archive.ubuntu.com/ubuntu/ disco universe
deb http://archive.ubuntu.com/ubuntu/ disco-updates universe
# deb-src http://archive.ubuntu.com/ubuntu/ disco-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://archive.ubuntu.com/ubuntu/ disco multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ disco multiverse
deb http://archive.ubuntu.com/ubuntu/ disco-updates multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ disco-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://archive.ubuntu.com/ubuntu/ disco-backports main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu/ disco-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu disco partner
# deb-src http://archive.canonical.com/ubuntu disco partner

deb http://security.ubuntu.com/ubuntu/ disco-security main restricted
# deb-src http://security.ubuntu.com/ubuntu/ disco-security main restricted
deb http://security.ubuntu.com/ubuntu/ disco-security universe
# deb-src http://security.ubuntu.com/ubuntu/ disco-security universe
deb http://security.ubuntu.com/ubuntu/ disco-security multiverse
# deb-src http://security.ubuntu.com/ubuntu/ disco-security multiverse