我尝试添加 ppa，但之后出现了以下消息。ppa 未添加，即不在 /etc/apt/sources.list.d 中。
$ sudo add-apt-repository -d ppa:fenics-packages/fenics
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/httplib2/__init__.py", line 1363, in _conn_request
conn.connect()
File "/usr/lib/python3/dist-packages/httplib2/__init__.py", line 1139, in connect
address_info = socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM)
File "/usr/lib/python3.10/socket.py", line 955, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -2] Name or service not known
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/bin/add-apt-repository", line 364, in <module>
sys.exit(0 if addaptrepo.main() else 1)
File "/usr/bin/add-apt-repository", line 347, in main
shortcut = handler(source, **shortcut_params)
File "/usr/lib/python3/dist-packages/softwareproperties/shortcuts.py", line 40, in shortcut_handler
return handler(shortcut, **kwargs)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 82, in __init__
if self.lpppa.publish_debug_symbols:
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 120, in lpppa
self._lpppa = self.lpteam.getPPAByName(name=self.ppaname)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 107, in lpteam
self._lpteam = self.lp.people(self.teamname)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 98, in lp
self._lp = login_func("%s.%s" % (self.__module__, self.__class__.__name__),
File "/usr/lib/python3/dist-packages/launchpadlib/launchpad.py", line 494, in login_anonymously
return cls(
File "/usr/lib/python3/dist-packages/launchpadlib/launchpad.py", line 230, in __init__
super(Launchpad, self).__init__(
File "/usr/lib/python3/dist-packages/lazr/restfulclient/resource.py", line 477, in __init__
self._browser.get(root_resource), 'application/json')
File "/usr/lib/python3/dist-packages/lazr/restfulclient/_browser.py", line 439, in get
response, content = self._request(url, extra_headers=headers)
File "/usr/lib/python3/dist-packages/lazr/restfulclient/_browser.py", line 389, in _request
response, content = self._request_and_retry(
File "/usr/lib/python3/dist-packages/lazr/restfulclient/_browser.py", line 359, in _request_and_retry
response, content = self._connection.request(
File "/usr/lib/python3/dist-packages/httplib2/__init__.py", line 1725, in request
(response, content) = self._request(
File "/usr/lib/python3/dist-packages/launchpadlib/launchpad.py", line 144, in _request
response, content = super(LaunchpadOAuthAwareHttp, self)._request(
File "/usr/lib/python3/dist-packages/lazr/restfulclient/_browser.py", line 184, in _request
return super(RestfulHttp, self)._request(
File "/usr/lib/python3/dist-packages/httplib2/__init__.py", line 1441, in _request
(response, content) = self._conn_request(conn, request_uri, method, body, headers)
File "/usr/lib/python3/dist-packages/httplib2/__init__.py", line 1370, in _conn_request
raise ServerNotFoundError("Unable to find the server at %s" % conn.host)
httplib2.error.ServerNotFoundError: Unable to find the server at api.launchpad.test
请注意，这不是 ppa 的问题，因为我已经尝试了其他几个 ppa。此外，我还尝试过清除 software-properties-common，但问题仍未解决。
以下是我的系统的信息：
$ lsb_release -rd
Description: Ubuntu 22.04.2 LTS
Release: 22.04
这是该包的版本：
$ apt-cache policy software-properties-common
software-properties-common:
Installé : 0.99.22.7
Candidat : 0.99.22.7
Table de version :
*** 0.99.22.7 500
500 http://fr.archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
500 http://fr.archive.ubuntu.com/ubuntu jammy-updates/main i386 Packages
100 /var/lib/dpkg/status
0.99.22 500
500 http://fr.archive.ubuntu.com/ubuntu jammy/main amd64 Packages
500 http://fr.archive.ubuntu.com/ubuntu jammy/main i386 Packages
以下是 software-properties-common 所依赖的其他软件包的版本：
$ apt-cache policy python3-software-properties
python3-software-properties:
Installé : 0.99.22.7
Candidat : 0.99.22.7
Table de version :
*** 0.99.22.7 500
500 http://fr.archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
500 http://fr.archive.ubuntu.com/ubuntu jammy-updates/main i386 Packages
100 /var/lib/dpkg/status
0.99.22 500
500 http://fr.archive.ubuntu.com/ubuntu jammy/main amd64 Packages
500 http://fr.archive.ubuntu.com/ubuntu jammy/main i386 Packages
$ apt-cache policy python-apt-common
python-apt-common:
Installé : 2.4.0ubuntu1
Candidat : 2.4.0ubuntu1
Table de version :
*** 2.4.0ubuntu1 500
500 http://fr.archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
500 http://fr.archive.ubuntu.com/ubuntu jammy-updates/main i386 Packages
100 /var/lib/dpkg/status
2.3.0ubuntu2 500
500 http://fr.archive.ubuntu.com/ubuntu jammy/main amd64 Packages
500 http://fr.archive.ubuntu.com/ubuntu jammy/main i386 Packages
答案1
出现了一个错误，现已解决。请参阅他们的官方消息
我们已经恢复了前端配置的相关部分，现在这个问题已经解决了。但是，如果您仍然看到程序失败并出现提及 api.launchpad.test 的错误，那么您需要运行
rm -rf ~/.launchpadlib/api.launchpad.net/cache/并重试。（不幸的是，从糟糕的缓存数据生命周期中自动恢复很难！）
答案2
尝试一下：
sudo apt-get install python3-launchpadlib
帮我解决了这个问题。