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System error 53
Windows

Windows "System error 53" and "System error 5" with net use: the network path, and access denied

Fix net use "System error 53: The network path was not found" and "System error 5: Access is denied": check DNS, ports 445 and 139, the share and your credentials.

Beginner · 4 min read

Can't connect to MySQL server
Databases

MySQL "ERROR 2003: Can't connect to MySQL server": read the number in brackets

Fix MySQL ERROR 2003 "Can't connect to MySQL server": the number in brackets says if it's a stopped server, bind-address, a firewall or the wrong host in Docker.

Beginner · 4 min read

network-related or instance-specific
Databases

SQL Server "A network-related or instance-specific error" (error 40, error 26): how to fix it

Fix SQL Server "A network-related or instance-specific error occurred": check the service, TCP/IP, the instance name, SQL Browser, port 1433 and the Windows firewall.

Intermediate · 4 min read

RPC server is unavailable
Windows

Windows "The RPC server is unavailable" (0x800706BA): how to find what blocks it

Fix "The RPC server is unavailable" (0x800706BA, error 1722): check the name, port 135, the dynamic ports, the firewall rules and the RPC services, step by step.

Intermediate · 4 min read

Connection timed out
Networking

"Connection timed out" vs "Connection refused": what each one tells you, and how to fix it

Timed out means a firewall dropped the packets; refused means nothing listens there. Tell them apart with nc and curl, then fix ufw, firewalld or the bind address.

Beginner · 5 min read