A specialized technical utility for identifying, terminating, and preventing network port conflicts on Linux systems.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install linux-port-resolver
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install linux-port-resolver using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Linux Port Resolver?
The Linux Port Resolver is a diagnostic and remediation tool designed to handle common networking hurdles such as the EADDRINUSE error. By utilizing these Openclaw Skills, developers and sysadmins can eliminate the guesswork involved when a service fails to bind to a port. The skill provides a precise workflow to detect which process is occupying a specific port, verify its safety, and free the resource to ensure high availability for your applications.
Beyond simple process termination, this tool integrates with system-level configurations like systemd and Docker. Using these Openclaw Skills allows for a more robust infrastructure where port conflicts are not just fixed, but proactively managed through automation and configuration best practices.
Linux Port Resolver Use Cases
- Resolving service startup failures caused by port already in use errors.
- Identifying rogue or zombie processes holding onto network sockets in development environments.
- Automating the clearing of specific ports before a systemd service starts to ensure successful binding.
- Troubleshooting complex Docker container port mapping conflicts on the host machine.
How Linux Port Resolver Works
- Scanning: The skill uses networking tools to scan for active listeners on a specified port, checking both IPv4 and IPv6 stacks.
- Identification: It captures the Process ID (PID) and the specific command responsible for the socket occupation.
- Verification: The tool inspects the PID details to ensure critical system daemons or PID 1 are not targeted accidentally.
- Remediation: It executes a graceful termination (SIGTERM) followed by a verification check, escalating to a forced kill (SIGKILL) only if necessary.
- Prevention: It provides configuration snippets to rebind services or automate port clearing in the service lifecycle.
Linux Port Resolver Setup
To utilize these Openclaw Skills, ensure your Linux environment has basic networking utilities installed. You can install the required packages using the following command:
sudo apt-get update && sudo apt-get install iproute2 -y
Once installed, you can use the built-in commands to find what is occupying a port:
ss -tlnp | grep :<YOUR_PORT>
Linux Port Resolver Data Schema & Taxonomy
The Linux Port Resolver organizes conflict data based on the following socket metadata structure:
| Property | Description |
|---|---|
| PORT | The local port number being audited |
| PID | The unique Process Identifier of the occupying process |
| PPID | Parent Process ID to trace process lineage |
| CMD | The full command string that initiated the process |
| USER | The system user context under which the process is running |
| STATE | The current socket state (usually LISTEN) |
Linux Port Resolver Advanced Features
- Multi-Stack Detection: Simultaneous checking of IPv4 and IPv6 listeners to ensure no hidden conflicts remain.
- systemd Integration: Advanced ExecStartPre hooks to automatically clear ports before a service attempts to start.
- Graceful Escalation: Logical workflow that prioritizes SIGTERM over SIGKILL to prevent data corruption in the occupying process.
- Docker Mapping Support: Guidance on adjusting docker-compose mappings to resolve host-level port collisions within the Openclaw Skills framework.
SKILL.md
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