我正在尝试升级到 20.04.1，但遇到了问题。
这是我的控制台：
sudo do-release-upgrade
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [1 554 B]
Get:2 Upgrade tool [1 342 kB]
Fetched 1 344 kB in 0s (0 B/s)
authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg'
extracting 'focal.tar.gz'
Reading cache
Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Get:1 https://download.docker.com/linux/ubuntu bionic InRelease [64,4 kB]
Hit https://repo.steampowered.com/steam stable InRelease
Hit http://security.ubuntu.com/ubuntu bionic-security InRelease
Hit https://repos.influxdata.com/debian stretch InRelease
Hit https://repo.steampowered.com/steam beta InRelease
Hit http://archive.ubuntu.com/ubuntu bionic InRelease
Hit https://downloads.plex.tv/repo/deb public InRelease
Hit http://archive.ubuntu.com/ubuntu bionic-updates InRelease
Hit http://archive.ubuntu.com/ubuntu bionic-backports InRelease
Fetched 64,4 kB in 0s (0 B/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
Checking for installed snaps
Calculating snap size requirements
Updating repository information
Third party sources disabled
Some third party entries in your sources.list were disabled. You can
re-enable them after the upgrade with the 'software-properties' tool
or your package manager.
To continue please press [ENTER]
Hit http://archive.ubuntu.com/ubuntu focal InRelease
Hit http://archive.ubuntu.com/ubuntu focal-updates InRelease
Hit http://archive.ubuntu.com/ubuntu focal-backports InRelease
Hit http://security.ubuntu.com/ubuntu focal-security InRelease
Fetched 0 B in 0s (0 B/s)
Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating the changes
Calculating the changes
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
This was likely caused by:
* Unofficial software packages not provided by Ubuntu
Please use the tool 'ppa-purge' from the ppa-purge
package to remove software from a Launchpad PPA and
try the upgrade again.
If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If
you want to investigate this yourself the log files in
'/var/log/dist-upgrade' will contain details about the upgrade.
Specifically, look at 'main.log' and 'apt.log'.
Restoring original system state
Aborting
Reading package lists... Done
Building dependency tree
Reading state information... Done
尝试安装 ppa-purge 但显示未找到。
sudo apt install ppa-purge
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package ppa-purge
现在我该怎么做？
答案1
打开 Universe 然后在那里更新实际上允许我安装更新！