每次我尝试添加 PPA 时，终端似乎都会停止。几分钟后什么都没有发生，我按下 ctrl-c，然后出现了几个错误消息。这是我尝试添加 mozilla ppa 时发生的。
$ sudo add-apt-repository ppa:ubuntu-mozilla-daily/ppa
^CTraceback (most recent call last):
File "/usr/bin/add-apt-repository", line 137, in <module>
shortcut = shortcut_handler(line)
File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 884, in shortcut_handler
ret = factory(shortcut)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 469, in shortcut_handler
return PPAShortcutHandler(shortcut)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 426, in __init__
info = get_ppa_info(self.shortcut)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 380, in get_ppa_info
ret = get_ppa_info_from_lp(user, ppa)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 110, in get_ppa_info_from_lp
return get_info_from_lp(lp_url)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 104, in get_info_from_lp
return get_info_from_https(lp_url, True)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 96, in get_info_from_https
data = func(lp_url=url, accept_json=accept_json, retry_delays=retry_delays)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 138, in _get_https_content_py3
lp_page = urllib.request.urlopen(request,
File "/usr/lib/python3.8/urllib/request.py", line 222, in urlopen
return opener.open(url, data, timeout)
File "/usr/lib/python3.8/urllib/request.py", line 525, in open
response = self._open(req, data)
File "/usr/lib/python3.8/urllib/request.py", line 542, in _open
result = self._call_chain(self.handle_open, protocol, protocol +
File "/usr/lib/python3.8/urllib/request.py", line 502, in _call_chain
result = func(*args)
File "/usr/lib/python3.8/urllib/request.py", line 1369, in https_open
return self.do_open(http.client.HTTPSConnection, req,
File "/usr/lib/python3.8/urllib/request.py", line 1326, in do_open
h.request(req.get_method(), req.selector, req.data, headers,
File "/usr/lib/python3.8/http/client.py", line 1240, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/lib/python3.8/http/client.py", line 1286, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/lib/python3.8/http/client.py", line 1235, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/lib/python3.8/http/client.py", line 1006, in _send_output
self.send(msg)
File "/usr/lib/python3.8/http/client.py", line 946, in send
self.connect()
File "/usr/lib/python3.8/http/client.py", line 1402, in connect
super().connect()
File "/usr/lib/python3.8/http/client.py", line 917, in connect
self.sock = self._create_connection(
File "/usr/lib/python3.8/socket.py", line 796, in create_connection
sock.connect(sa)
KeyboardInterrupt
这是我尝试添加启动修复存储库：
sudo add-apt-repository ppa:yannubuntu/boot-repair
^CTraceback (most recent call last):
File "/usr/bin/add-apt-repository", line 137, in <module>
shortcut = shortcut_handler(line)
File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 884, in shortcut_handler
ret = factory(shortcut)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 469, in shortcut_handler
return PPAShortcutHandler(shortcut)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 426, in __init__
info = get_ppa_info(self.shortcut)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 380, in get_ppa_info
ret = get_ppa_info_from_lp(user, ppa)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 110, in get_ppa_info_from_lp
return get_info_from_lp(lp_url)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 104, in get_info_from_lp
return get_info_from_https(lp_url, True)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 96, in get_info_from_https
data = func(lp_url=url, accept_json=accept_json, retry_delays=retry_delays)
File "/usr/lib/python3/dist-packages/softwareproperties/ppa.py", line 138, in _get_https_content_py3
lp_page = urllib.request.urlopen(request,
File "/usr/lib/python3.8/urllib/request.py", line 222, in urlopen
return opener.open(url, data, timeout)
File "/usr/lib/python3.8/urllib/request.py", line 525, in open
response = self._open(req, data)
File "/usr/lib/python3.8/urllib/request.py", line 542, in _open
result = self._call_chain(self.handle_open, protocol, protocol +
File "/usr/lib/python3.8/urllib/request.py", line 502, in _call_chain
result = func(*args)
File "/usr/lib/python3.8/urllib/request.py", line 1369, in https_open
return self.do_open(http.client.HTTPSConnection, req,
File "/usr/lib/python3.8/urllib/request.py", line 1326, in do_open
h.request(req.get_method(), req.selector, req.data, headers,
File "/usr/lib/python3.8/http/client.py", line 1240, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/lib/python3.8/http/client.py", line 1286, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/lib/python3.8/http/client.py", line 1235, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/lib/python3.8/http/client.py", line 1006, in _send_output
self.send(msg)
File "/usr/lib/python3.8/http/client.py", line 946, in send
self.connect()
File "/usr/lib/python3.8/http/client.py", line 1402, in connect
super().connect()
File "/usr/lib/python3.8/http/client.py", line 917, in connect
self.sock = self._create_connection(
File "/usr/lib/python3.8/socket.py", line 796, in create_connection
sock.connect(sa)
KeyboardInterrupt
更新：
按照建议使用 python3 -m trace --trace ppa:ubuntu-mozilla-daily/ppa 运行后which add-apt-repository，结果如下：
Traceback (most recent call last):
File "/usr/lib/python3.8/runpy.py", line 193, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/usr/lib/python3.8/runpy.py", line 86, in _run_code
exec(code, run_globals)
File "/usr/lib/python3.8/trace.py", line 755, in <module>
main()
File "/usr/lib/python3.8/trace.py", line 743, in main
t.runctx(code, globs, globs)
File "/usr/lib/python3.8/trace.py", line 449, in runctx
exec(cmd, globals, locals)
File "/usr/bin/add-apt-repository", line 21, in <module>
sys.stdout = io.TextIOWrapper(
File "/usr/bin/add-apt-repository", line 21, in <module>
sys.stdout = io.TextIOWrapper(
File "/usr/lib/python3.8/trace.py", line 590, in localtrace_trace
print("%s(%d): %s" % (bname, lineno,
ValueError: underlying buffer has been detached
Exception ignored in: <_io.TextIOWrapper mode='w' encoding='utf-8'>
ValueError: underlying buffer has been detached
更新：我刚刚尝试在此处手动添加 ppa：/etc/apt/sources.list 并导入 GPG 密钥，成功了。所以我想我的 apt 可能出了问题？
最后更新：现在它似乎运行正常。我不知道我做了哪些修复该问题的方法，为什么直到现在，几天后，它才恢复运行，但 ubuntu 似乎有时会自我修复，哈哈。
无论如何，非常感谢您的帮助！！
答案1
当您按下 Ctrl-C 时，它会在 sock.connect 中终止，这意味着它正在尝试并等待连接到远程主机。要么是该主机出了问题，要么是您所连接的网络对访问该主机存在一些障碍。