user01@deb-test:~/Downloads$ sudo apt-get update
Ign:1 cdrom://[Debian GNU/Linux 10.1.0 _Buster_ - Official amd64 DVD Binary-1 20190908-01:09] buster InRelease
Err:2 cdrom://[Debian GNU/Linux 10.1.0 _Buster_ - Official amd64 DVD Binary-1 20190908-01:09] buster Release
Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Err:3
http://packages.netxms.org/debian buster InRelease
Could not resolve 'packages.netxms.org'
Err:4
http://deb.debian.org/debian buster InRelease
Could not resolve 'deb.debian.org'
Err:5
http://security.debian.org/debian-security buster/updates InRelease
Could not resolve 'security.debian.org'
Reading package lists... Done
E: The repository 'cdrom://[Debian GNU/Linux 10.1.0 _Buster_ - Official amd64 DVD Binary-1 20190908-01:09] buster Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(

manpage for repository creation and user configuration details.
W: Target Packages (contrib/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target Packages (contrib/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target Translations (contrib/i18n/Translation-en_US) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target Translations (contrib/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target DEP-11 (contrib/dep11/Components-amd64.yml) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target DEP-11 (contrib/dep11/Components-all.yml) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target DEP-11-icons-small (contrib/dep11/icons-48x48.tar) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target DEP-11-icons (contrib/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target Translations (main/i18n/Translation-en_US) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target Translations (main/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target DEP-11 (main/dep11/Components-amd64.yml) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target DEP-11 (main/dep11/Components-all.yml) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target DEP-11-icons-small (main/dep11/icons-48x48.tar) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5
W: Target DEP-11-icons (main/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list:3 and /etc/apt/sources.list:5