E: The repository 'https:/dl.winehq.org/wine-builds/ubuntu bionic 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(8) manpage for repository creation and user configuration details.
W: GPG error: http://apt.llvm.org/bionic llvm-toolchain-bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 15CF4D18AF4F7421
E: The repository 'http://apt.llvm.org/bionic llvm-toolchain-bionic InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://apt.llvm.org/bionic llvm-toolchain-bionic-6.0 InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 15CF4D18AF4F7421
E: The repository 'http://apt.llvm.org/bionic llvm-toolchain-bionic-6.0 InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://dl.winehq.org/wine-builds/ubuntu bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 76F1A20FF987672F
W: GPG error: http://apt.llvm.org/bionic llvm-toolchain-bionic-7 InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 15CF4D18AF4F7421
E: The repository 'http://apt.llvm.org/bionic llvm-toolchain-bionic-7 InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/kxstudio-team/builds/ubuntu bionic 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(8) manpage for repository creation and user configuration details.
W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target Packages (main/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target Translations (main/i18n/Translation-en_US) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target Translations (main/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target DEP-11 (main/dep11/Components-amd64.yml) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target DEP-11 (main/dep11/Components-all.yml) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target DEP-11-icons-small (main/dep11/icons-48x48.tar) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target DEP-11-icons (main/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target DEP-11-icons-hidpi (main/dep11/icons-64x64@2.tar) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target DEP-11-icons-large (main/dep11/icons-128x128.tar) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target Contents-deb (main/Contents-amd64) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target Contents-deb (main/Contents-i386) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target Contents-deb (main/Contents-all) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target CNF (main/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62
W: Target CNF (main/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list:56 and /etc/apt/sources.list:62