SSH Workbench
Troubleshooting

Server Troubleshooting Guides

Diagnostic guides for the server errors that actually waste time. Each walks through the real causes and the commands that find them.

Putty

PuTTY Access DeniedHow to Fix It
PuTTY Cannot Open DisplayHow to Fix It
PuTTY Couldn't Agree a Key Exchange AlgorithmHow to Fix It
PuTTY InactiveHow to Fix It
PuTTY Key Format Too NewHow to Fix It
PuTTY Network Error: Connection RefusedHow to Fix It
PuTTY Network Error: Connection Timed OutHow to Fix It
PuTTY Network Error: Software Caused Connection AbortHow to Fix It
PuTTY No Supported Authentication Methods AvailableHow to Fix It
PuTTY Not Working on Windows 11How to Fix It
PuTTY Server Refused Our KeyHow to Fix It
PuTTY Unable To Open Serial PortHow to Fix It
PuTTY Unable To Use Key FileHow to Fix It
PuTTY Warning: Potential Security BreachHow to Fix It

SSH

SSH Broken PipeHow to Fix It
SSH Connection RefusedHow to Fix It
SSH Could Not Resolve HostnameHow to Fix It
SSH Host Key Verification FailedHow to Fix It
SSH Permission Denied (publickey)How to Fix It
SSH Too Many Authentication FailuresHow to Fix It

Docker

Docker Cannot Connect to the Docker DaemonHow to Fix It
Docker Container Keeps RestartingHow to Fix It
Docker Error Response from DaemonHow to Fix It
Docker No Space Left on DeviceHow to Fix It