sudo apt update
Ign:1
http://httpredir.debian.org/debian stable InRelease
Err:2
http://httpredir.debian.org/debian stable Release
404 Not Found
Ign:3
http://by.archive.ubuntu.com/ubuntu xenial InRelease
Ign:4
http://deb.debian.org/debian unstable InRelease
Ign:5
http://deb.debian.org/debian-debug unstable-debug InRelease
Ign:6
http://by.archive.ubuntu.com/ubuntu xenial-security InRelease
Ign:7
http://by.archive.ubuntu.com/ubuntu xenial-updates InRelease
Ign:8
http://deb.debian.org/debian-ports unstable InRelease
Err:9
http://by.archive.ubuntu.com/ubuntu xenial Release
404 Not Found
Ign:10
http://deb.debian.org/debian-security unstable InRelease
Err:11
http://deb.debian.org/debian unstable Release
404 Not Found
Err:12
http://by.archive.ubuntu.com/ubuntu xenial-security Release
404 Not Found
Err:13
http://deb.debian.org/debian-debug unstable-debug Release
404 Not Found
Err:14
http://by.archive.ubuntu.com/ubuntu xenial-updates Release
404 Not Found
Err:15
http://deb.debian.org/debian-ports unstable Release
404 Not Found
Err:16
http://deb.debian.org/debian-security unstable Release
404 Not Found
Reading package lists... Done
W: Target Sources (main/source/Sources) is configured multiple times in /etc/apt/sources.list:14 and /etc/apt/sources.list:39
W: Target Sources (restricted/source/Sources) is configured multiple times in /etc/apt/sources.list:14 and /etc/apt/sources.list:39
W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Packages (main/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Translations (main/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Packages (restricted/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Packages (restricted/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Packages (restricted/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Translations (restricted/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
E: The repository '
http://httpredir.debian.org/debian stable 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.
E: The repository '
http://by.archive.ubuntu.com/ubuntu xenial 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.
E: The repository '
http://deb.debian.org/debian unstable 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.
E: The repository '
http://by.archive.ubuntu.com/ubuntu xenial-security 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.
E: The repository '
http://deb.debian.org/debian-debug unstable-debug 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.
E: The repository '
http://by.archive.ubuntu.com/ubuntu xenial-updates 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.
E: The repository '
http://deb.debian.org/debian-ports unstable 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.
E: The repository '
http://deb.debian.org/debian-security unstable 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 Sources (main/source/Sources) is configured multiple times in /etc/apt/sources.list:14 and /etc/apt/sources.list:39
W: Target Sources (restricted/source/Sources) is configured multiple times in /etc/apt/sources.list:14 and /etc/apt/sources.list:39
W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Packages (main/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Translations (main/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Packages (restricted/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Packages (restricted/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Packages (restricted/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
W: Target Translations (restricted/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:12 and /etc/apt/sources.list:38
sudo apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 77 not upgraded.