~# nano /etc/apt/sources.list
I got stuck trying to update php 7.2 to 7.4 because my Digital Ocean
server was on an older version of Ubuntu.
If I tried to update my release I'd get the following
# do-release-upgrade
Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore.
For upgrade information, please visit:
http://www.ubuntu.com/releaseendoflife
Please install all available updates for your release before upgrading.
When attempting to update my packages with apt-get update I would
get these types of errors.
Err:5 http://mirrors.digitalocean.com/ubuntu disco Release
404 Not Found [IP: 172.67.168.253 80
E: The repository 'http://mirrors.digitalocean.com/ubuntu disco Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
These occur because my Ubuntu version is not only out of date but at
its end of life so updating Ubuntu to a newer version.will require me
to update my repositories.
Digital Ocean uses its own mirrors for repositories so there is a
little more work there in figuring out which ones to use.
What version of Ubuntu am I on?
# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 19.04
Release: 19.04
Codename: disco
What repositories are being used?
~# nano /etc/apt/sources.list
Example repoistory on Digital Ocean Ubuntu 19.04
deb http://mirrors.digitalocean.com/ubuntu/ disco main restricted
Let's first get our current Ubuntu version up to date
To make the server update the files, we had to edit the
/etc/apt/sources.list
with working repository locations.
To goal here, on this Digital Ocean server is to update the urls they
use for the repositories with ones you that will have the files you
need for your update
We want to replace this urls
mirrors.digitalocean.com
with
old-releases.ubuntu.com
This command will work
sudo sed -i -e 's/mirrors.digitalocean.com/old-releases.ubuntu.com/g'
/etc/apt/sources.list
Now
sudo apt-get update
will work!
Let's keep going
sudo apt-get upgrade -y
sudo apt-get dist-upgrade
Try to upgrade Ubuntu on the command line.
We are still unable to upgrade via do-release-upgrade
# do-release-upgrade
Checking package manager
Can not upgrade
An upgrade from 'disco' to 'focal' is not supported with this tool.
Frack!
So now I have my current outdated version of Ubuntu up to date, but I
can't upgrade to the next version using do-release-upgrade
You can try to upgrade manually.
First go to https://changelogs.ubuntu.com/meta-release and scroll down
to the release you want to upgrade to.
For example if you want to upgrade to Ubuntu 19.10 Eoan scroll to you
find the url to the UpgradeTool
UpgradeTool: http://old-releases.ubuntu.com/ubuntu/dists/eoan-updates/main/dist-upgrader-all/current/eoan.tar.gz
Now pull this over to a directory on your server
wget http://old-releases.ubuntu.com/ubuntu/dists/eoan-updates/main/dist-upgrader-all/current/eoan.tar.gz
mkdir eoan_upgrade
tar -xvzf eoan.tar.gz -C eoan_upgrade
cd eoan_upgrade
Run the upgrade script
sudo ./eoan
sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
eoan
版本: Ubuntu将选择距离您最近的镜像 -> 下载速度更快 deb mirror://mirrors.ubuntu.com/mirrors.txt eoan main restricted universe multiverse deb mirror://mirrors.ubuntu.com/mirrors.txt eoan-updates main restricted universe multiverse deb mirror://mirrors.ubuntu.com/mirrors.txt eoan-backports main restricted universe multiverse deb mirror://mirrors.ubuntu.com/mirrors.txt eoan-security main restricted universe multiverse然后执行以下命令进行更新:sudo apt update
sudo apt dist-upgrade
现在应该很容易更新到focal版本了。 - arnonuem