سلام.
من میخوام از اوبونتو ۱۶.۰۴ برم به نسخه بعدی lts.
اینم فایل os-release
NAME="Ubuntu"
VERSION="16.04.7 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.7 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial
اولین قدم اجرای
sudo apt update
هست ولی اجرای این دستور کلی پیغام خطا پس میفرسته.
sudo apt update
Ign:1 https://esm.ubuntu.com/infra/ubuntu bionic-infra-security InRelease
Ign:2 https://esm.ubuntu.com/infra/ubuntu xenial-infra-security InRelease
Err:3 https://esm.ubuntu.com/infra/ubuntu bionic-infra-security Release
Received HTTP code 503 from proxy after CONNECT
Err:4 https://esm.ubuntu.com/infra/ubuntu xenial-infra-security Release
Received HTTP code 503 from proxy after CONNECT
Ign:5 http://archive.canonical.com/ubuntu bionic InRelease
Err:6 http://archive.canonical.com/ubuntu bionic Release
503 Forwarding failure
Ign:7 http://security.ubuntu.com/ubuntu bionic-security InRelease
Ign:8 http://ir.archive.ubuntu.com/ubuntu bionic InRelease
Ign:9 http://ir.archive.ubuntu.com/ubuntu bionic-updates InRelease
Err:10 http://security.ubuntu.com/ubuntu bionic-security Release
503 Forwarding failure
Ign:11 http://ir.archive.ubuntu.com/ubuntu bionic-backports InRelease
Err:12 http://ir.archive.ubuntu.com/ubuntu bionic Release
503 Forwarding failure
Err:13 http://ir.archive.ubuntu.com/ubuntu bionic-updates Release
503 Forwarding failure
Err:14 http://ir.archive.ubuntu.com/ubuntu bionic-backports Release
503 Forwarding failure
Reading package lists... Done
E: The repository 'https://esm.ubuntu.com/infra/ubuntu bionic-infra-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(8) manpage for repository creation and user configuration details.
E: The repository 'https://esm.ubuntu.com/infra/ubuntu xenial-infra-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(8) manpage for repository creation and user configuration details.
E: The repository 'http://archive.canonical.com/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.
E: The repository 'http://security.ubuntu.com/ubuntu bionic-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(8) manpage for repository creation and user configuration details.
E: The repository 'http://ir.archive.ubuntu.com/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.
E: The repository 'http://ir.archive.ubuntu.com/ubuntu bionic-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(8) manpage for repository creation and user configuration details.
E: The repository 'http://ir.archive.ubuntu.com/ubuntu bionic-backports 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.
اینم source.list هست.
# deb cdrom:[Ubuntu 16.04.3 LTS _Xenial Xerus_ - Release amd64 (20170801)]/ xenial main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://ir.archive.ubuntu.com/ubuntu/ bionic main restricted
# deb-src http://ir.archive.ubuntu.com/ubuntu/ xenial main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://ir.archive.ubuntu.com/ubuntu/ bionic-updates main restricted
# deb-src http://ir.archive.ubuntu.com/ubuntu/ xenial-updates main restricted
# deb http://download.virtualbox.org/virtualbox/debian bionic contrib # disabled on upgrade to bionic
## 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://ir.archive.ubuntu.com/ubuntu/ bionic universe
# deb-src http://ir.archive.ubuntu.com/ubuntu/ xenial universe
deb http://ir.archive.ubuntu.com/ubuntu/ bionic-updates universe
# deb-src http://ir.archive.ubuntu.com/ubuntu/ xenial-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://ir.archive.ubuntu.com/ubuntu/ bionic multiverse
# deb-src http://ir.archive.ubuntu.com/ubuntu/ xenial multiverse
deb http://ir.archive.ubuntu.com/ubuntu/ bionic-updates multiverse
# deb-src http://ir.archive.ubuntu.com/ubuntu/ xenial-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://ir.archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse
# deb-src http://ir.archive.ubuntu.com/ubuntu/ xenial-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 bionic partner
deb-src http://archive.canonical.com/ubuntu bionic partner
deb http://security.ubuntu.com/ubuntu bionic-security main restricted
# deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted
deb http://security.ubuntu.com/ubuntu bionic-security universe
# deb-src http://security.ubuntu.com/ubuntu xenial-security universe
deb http://security.ubuntu.com/ubuntu bionic-security multiverse
# deb-src http://security.ubuntu.com/ubuntu xenial-security multiverse
# deb-src http://download.virtualbox.org/virtualbox/debian xenial contrib