OperationalError: (2003, "Can't connect to MySQL server on u'localhost' ([Errno 111] Connection refused)")

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Can't connect to MySQL server on u'localhost

Backing up sites… Traceback (most recent call last): File “/usr/lib/python2.7/runpy.py”, line 174, in _run_module_as_main “main”, fname, loader, pkg_name) File “/usr/lib/python2.7/runpy.py”, line 72, in _run_code exec code in run_globals File “/home/frappe/frappe-bench/apps/frappe/frappe/utils/bench_helper.py”, line 94, in main() File “/home/frappe/frappe-bench/apps/frappe/frappe/utils/bench_helper.py”, line 18, in main click.Group(commands=commands)(prog_name=‘bench’) File “/home/fr…