function::ns_pid - Linux

Overview

ns_pid is a versatile Linux tool used to retrieve the process ID (PID) of a container’s network namespace, offering insights into the network configurations and interconnections within containerized environments.

Syntax

ns_pid [ -n namespace ]

Options/Flags

-n, –namespace

Specify the network namespace’s name or ID. Default: current namespace.

Examples

Get PID of current network namespace:

$ ns_pid

Get PID of a specific namespace:

$ ns_pid -n my-namespace

Common Issues

  • Namespace not found: Ensure the provided namespace name or ID is valid and accessible.

Integration

Combining with netstat:

$ ns_pid -n my-namespace | xargs netstat -nap --namespace

Using in scripts:

#!/bin/bash

ns_pid=$(ns_pid -n my-namespace)
echo "PID of my-namespace: $ns_pid"

Related Commands

  • ip netns: Manage network namespaces.
  • ping: Network troubleshooting tool.

Further Reading