Question: I have two devices that I use as MySql server and Django server. My system, which works on my development device, becomes inoperable when it switches to other devices. Settings on 192.168.3.60: DATABASES = { 'default': { 'ENGINE': 'django.db.backends.mysql', 'NAME': 'bildirdi_hurmalar', 'USER': 'gungelir_tirmalar', 'PASSWORD': 'EhuEhu_1793', 'HOST': '192.168.3.65', 'PORT': '3306', } }  Apache2 and wsgi on mainside. Error when I run Migrate or runserver: (env) pi@raspberrypi:~/bilidrdi.com $ python manage.py runserver Watching for file changes with StatReloader Exception in thread django-main-thread: Traceback (most recent call last): File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/MySQLdb/__init__.py", line 18, in <module> from . import _mysql ImportError: libmariadb.so.3: cannot open shared object file: No such file or directory During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/lib/python3.7/threading.py", line 917, in _bootstrap_inner self.run() File "/usr/lib/python3.7/threading.py", line 865, in run self._target(*self._args, **self._kwargs) File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/utils/autoreload.py", line 64, in wrapper fn(*args, **kwargs) File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 110, in inner_run autoreload.raise_last_exception() File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/utils/autoreload.py", line 87, in raise_last_exception raise _exception[1] File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/core/management/__init__.py", line 375, in execute autoreload.check_errors(django.setup)() File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/utils/autoreload.py", line 64, in wrapper fn(*args, **kwargs) File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/__init__.py", line 24, in setup apps.populate(settings.INSTALLED_APPS) File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/apps/registry.py", line 114, in populate app_config.import_models() File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/apps/config.py", line 301, in import_models self.models_module = import_module(models_module_name) File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "<frozen importlib._bootstrap>", line 1006, in _gcd_import File "<frozen importlib._bootstrap>", line 983, in _find_and_load File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 677, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 728, in exec_module File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/contrib/auth/models.py", line 3, in <module> from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/contrib/auth/base_user.py", line 48, in <module> class AbstractBaseUser(models.Model): File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/db/models/base.py", line 122, in __new__ new_class.add_to_class('_meta', Options(meta, app_label)) File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/db/models/base.py", line 326, in add_to_class value.contribute_to_class(cls, name) File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/db/models/options.py", line 207, in contribute_to_class self.db_table = truncate_name(self.db_table, connection.ops.max_name_length()) File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/utils/connection.py", line 15, in __getattr__ return getattr(self._connections[self._alias], item) File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/utils/connection.py", line 62, in __getitem__ conn = self.create_connection(alias) File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/db/utils.py", line 204, in create_connection backend = load_backend(db['ENGINE']) File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/db/utils.py", line 111, in load_backend return import_module('%s.base' % backend_name) File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/django/db/backends/mysql/base.py", line 15, in <module> import MySQLdb as Database File "/home/pi/bilidrdi.com/env/lib/python3.7/site-packages/MySQLdb/__init__.py", line 24, in <module> version_info, _mysql.version_info, _mysql.__file__ NameError: name '_mysql' is not defined  Requirements: asgiref==3.4.1 Django==3.2.5 django-bootstrap-form==3.4 django-post-office==3.5.3 jsonfield==3.1.0 mysql-client==0.0.1 mysqlclient==2.0.3 nano==0.10.0 Pillow==8.3.1 pkg-resources==0.0.0 pytz==2021.1 sqlparse==0.4.1 typing-extensions==3.10.0.0  192.1683.65 is dedicated server on debian.

Answer: Try to install libmariadbclient-dev: sudo apt install libmariadbclient-dev