I installed gns3 on unbuntu and upgraded to 19.04 and have issues... how to fix and how to prevent?
: The repository 'http://archive.canonical.com/ubuntu multiuniverse 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.
E: The repository 'https://download.docker.com/linux/ubuntu eoan 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.
N: Skipping acquire of configured file 'partner/binary-1386/Packages' as repository 'http://archive.canonical.com/ubuntu disco InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://us.archive.ubuntu.com/ubuntu eoan InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'restricted/binary-1386/Packages' as repository 'http://us.archive.ubuntu.com/ubuntu eoan InRelease' doesn't support architecture '1386'
W: Skipping acquire of configured file 'stable/source/Sources' as repository 'https://download.docker.com/linux/ubuntu disco InRelease' does not seem to provide it (sources.list entry misspelt?)
W: GPG error: http://dl.google.com/linux/chrome/deb stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6494C6D6997C215E
E: The repository 'http://dl.google.com/linux/chrome/deb stable Release' 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.
N: Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://ppa.launchpad.net/gns3/ppa/ubuntu eoan InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://archive.ubuntu.com/ubuntu eoan InRelease' doesn't support architecture '1386'
: The repository 'http://archive.canonical.com/ubuntu multiuniverse 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.
E: The repository 'https://download.docker.com/linux/ubuntu eoan 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.
N: Skipping acquire of configured file 'partner/binary-1386/Packages' as repository 'http://archive.canonical.com/ubuntu disco InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://us.archive.ubuntu.com/ubuntu eoan InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'restricted/binary-1386/Packages' as repository 'http://us.archive.ubuntu.com/ubuntu eoan InRelease' doesn't support architecture '1386'
W: Skipping acquire of configured file 'stable/source/Sources' as repository 'https://download.docker.com/linux/ubuntu disco InRelease' does not seem to provide it (sources.list entry misspelt?)
W: GPG error: http://dl.google.com/linux/chrome/deb stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6494C6D6997C215E
E: The repository 'http://dl.google.com/linux/chrome/deb stable Release' 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.
N: Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://ppa.launchpad.net/gns3/ppa/ubuntu eoan InRelease' doesn't support architecture '1386'
N: Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://archive.ubuntu.com/ubuntu eoan InRelease' doesn't support architecture '1386'