Question: I have enabled WSL in my Windows 10 and installed Ubuntu 20.04 LTS from Microsoft store. To use meep software, I am following the installation process on my Windows 10. Unfortunately, when I am running below command, conda create -n mp -c conda-forge pymeep  I am getting an error like, Collecting package metadata (current_repodata.json): failed CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://conda.anaconda.org/conda-forge/linux-64/current_repodata.json> Elapsed: - An HTTP error occurred when trying to retrieve this URL. HTTP errors are often intermittent, and a simple retry will get you on your way. 'https://conda.anaconda.org/conda-forge/linux-64'  I have tried to disable ssl with below command, conda config --set ssl_verify no  But no luck. Now, How to resolve this issue? here is the --verbose output of the command, tasmia@TASMIA-PC:~/study/softwares$ conda create -n mp -c conda-forge pymeep -v Collecting package metadata (current_repodata.json): ...working... Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46d7220>: Failed to establish a new connection: [Errno -2] Name or service not known')': /pkgs/r/noarch/current_repodata.json Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46d7be0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /conda-forge/linux-64/current_repodata.json Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46d74c0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /conda-forge/noarch/current_repodata.json Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46d7fd0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /pkgs/r/linux-64/current_repodata.json Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46ef7c0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /pkgs/main/noarch/current_repodata.json Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46fd4f0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /pkgs/main/linux-64/current_repodata.json Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46ef3d0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /pkgs/r/noarch/current_repodata.json Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46ef550>: Failed to establish a new connection: [Errno -2] Name or service not known')': /conda-forge/linux-64/current_repodata.json Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46efb20>: Failed to establish a new connection: [Errno -2] Name or service not known')': /pkgs/r/linux-64/current_repodata.json Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46ef970>: Failed to establish a new connection: [Errno -2] Name or service not known')': /conda-forge/noarch/current_repodata.json Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46efd00>: Failed to establish a new connection: [Errno -2] Name or service not known')': /pkgs/main/noarch/current_repodata.json Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46fd6d0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /pkgs/main/linux-64/current_repodata.json Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46fda30>: Failed to establish a new connection: [Errno -2] Name or service not known')': /pkgs/r/noarch/current_repodata.json Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46fdc10>: Failed to establish a new connection: [Errno -2] Name or service not known')': /conda-forge/linux-64/current_repodata.json Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46fdd90>: Failed to establish a new connection: [Errno -2] Name or service not known')': /pkgs/r/linux-64/current_repodata.json Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e46fdf10>: Failed to establish a new connection: [Errno -2] Name or service not known')': /conda-forge/noarch/current_repodata.json Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e464c0d0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /pkgs/main/noarch/current_repodata.json Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e464c250>: Failed to establish a new connection: [Errno -2] Name or service not known')': /pkgs/main/linux-64/current_repodata.json failed Traceback (most recent call last): File "/home/tasmia/miniconda/lib/python3.9/site-packages/urllib3/connection.py", line 169, in _new_conn conn = connection.create_connection( File "/home/tasmia/miniconda/lib/python3.9/site-packages/urllib3/util/connection.py", line 73, in create_connection for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM): File "/home/tasmia/miniconda/lib/python3.9/socket.py", line 953, 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 "/home/tasmia/miniconda/lib/python3.9/site-packages/urllib3/connectionpool.py", line 699, in urlopen httplib_response = self._make_request( File "/home/tasmia/miniconda/lib/python3.9/site-packages/urllib3/connectionpool.py", line 382, in _make_request self._validate_conn(conn) File "/home/tasmia/miniconda/lib/python3.9/site-packages/urllib3/connectionpool.py", line 1010, in _validate_conn conn.connect() File "/home/tasmia/miniconda/lib/python3.9/site-packages/urllib3/connection.py", line 353, in connect conn = self._new_conn() File "/home/tasmia/miniconda/lib/python3.9/site-packages/urllib3/connection.py", line 181, in _new_conn raise NewConnectionError( urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPSConnection object at 0x7f02e464c700>: Failed to establish a new connection: [Errno -2] Name or service not known During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/home/tasmia/miniconda/lib/python3.9/site-packages/requests/adapters.py", line 439, in send resp = conn.urlopen( File "/home/tasmia/miniconda/lib/python3.9/site-packages/urllib3/connectionpool.py", line 783, in urlopen return self.urlopen( File "/home/tasmia/miniconda/lib/python3.9/site-packages/urllib3/connectionpool.py", line 783, in urlopen return self.urlopen( File "/home/tasmia/miniconda/lib/python3.9/site-packages/urllib3/connectionpool.py", line 783, in urlopen return self.urlopen( File "/home/tasmia/miniconda/lib/python3.9/site-packages/urllib3/connectionpool.py", line 755, in urlopen retries = retries.increment( File "/home/tasmia/miniconda/lib/python3.9/site-packages/urllib3/util/retry.py", line 574, in increment raise MaxRetryError(_pool, url, error or ResponseError(cause)) urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='conda.anaconda.org', port=443): Max retries exceeded with url: /conda-forge/linux-64/current_repodata.json (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e464c700>: Failed to establish a new connection: [Errno -2] Name or service not known')) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/core/subdir_data.py", line 701, in fetch_repodata_remote_request resp = session.get(join_url(url, filename), headers=headers, proxies=session.proxies, File "/home/tasmia/miniconda/lib/python3.9/site-packages/requests/sessions.py", line 555, in get return self.request('GET', url, **kwargs) File "/home/tasmia/miniconda/lib/python3.9/site-packages/requests/sessions.py", line 542, in request resp = self.send(prep, **send_kwargs) File "/home/tasmia/miniconda/lib/python3.9/site-packages/requests/sessions.py", line 655, in send r = adapter.send(request, **kwargs) File "/home/tasmia/miniconda/lib/python3.9/site-packages/requests/adapters.py", line 516, in send raise ConnectionError(e, request=request) requests.exceptions.ConnectionError: HTTPSConnectionPool(host='conda.anaconda.org', port=443): Max retries exceeded with url: /conda-forge/linux-64/current_repodata.json (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f02e464c700>: Failed to establish a new connection: [Errno -2] Name or service not known')) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/exceptions.py", line 1079, in __call__ return func(*args, **kwargs) File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/cli/main.py", line 84, in _main exit_code = do_call(args, p) File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/cli/conda_argparse.py", line 83, in do_call return getattr(module, func_name)(args, parser) File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/cli/main_create.py", line 41, in execute install(args, parser, 'create') File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/cli/install.py", line 261, in install unlink_link_transaction = solver.solve_for_transaction( File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/core/solve.py", line 114, in solve_for_transaction unlink_precs, link_precs = self.solve_for_diff(update_modifier, deps_modifier, File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/core/solve.py", line 157, in solve_for_diff final_precs = self.solve_final_state(update_modifier, deps_modifier, prune, ignore_pinned, File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/core/solve.py", line 262, in solve_final_state ssc = self._collect_all_metadata(ssc) File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/common/io.py", line 88, in decorated return f(*args, **kwds) File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/core/solve.py", line 425, in _collect_all_metadata index, r = self._prepare(prepared_specs) File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/core/solve.py", line 1020, in _prepare reduced_index = get_reduced_index(self.prefix, self.channels, File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/core/index.py", line 288, in get_reduced_index new_records = SubdirData.query_all(spec, channels=channels, subdirs=subdirs, File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/core/subdir_data.py", line 140, in query_all result = tuple(concat(executor.map(subdir_query, channel_urls))) File "/home/tasmia/miniconda/lib/python3.9/concurrent/futures/_base.py", line 608, in result_iterator yield fs.pop().result() File "/home/tasmia/miniconda/lib/python3.9/concurrent/futures/_base.py", line 445, in result return self.__get_result() File "/home/tasmia/miniconda/lib/python3.9/concurrent/futures/_base.py", line 390, in __get_result raise self._exception File "/home/tasmia/miniconda/lib/python3.9/concurrent/futures/thread.py", line 52, in run result = self.fn(*self.args, **self.kwargs) File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/core/subdir_data.py", line 132, in <lambda> subdir_query = lambda url: tuple(SubdirData(Channel(url), repodata_fn=repodata_fn).query( File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/core/subdir_data.py", line 145, in query self.load() File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/core/subdir_data.py", line 210, in load _internal_state = self._load() File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/core/subdir_data.py", line 375, in _load raw_repodata_str = fetch_repodata_remote_request( File "/home/tasmia/miniconda/lib/python3.9/site-packages/conda/core/subdir_data.py", line 806, in fetch_repodata_remote_request raise CondaHTTPError(help_message, conda.exceptions.CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://conda.anaconda.org/conda-forge/linux-64/current_repodata.json> Elapsed: - An HTTP error occurred when trying to retrieve this URL. HTTP errors are often intermittent, and a simple retry will get you on your way. 'https://conda.anaconda.org/conda-forge/linux-64' 

Answer: Maybe this discussion here helps: https://github.com/conda/conda/issues/9948 In summary three fixes are suggested there:  Install an older version (4.7.12) of conda / miniconda see here Change file- & directory-permissions of your miniconda-installation (chmod -R 777 ~/.miniconda3) see here Restart wsl (wsl --shutdown) see here