nsctl

nsctl is a CLI tool for building your own network topology with pure Linux namespaces — no containers, no overhead, full control.

Develop Environment

Environment	Value
OS	Ubuntu 25.04
Go	go1.25.5 linux/amd64
Golint	v2.7.2

Usage

Manual Build

git clone https://github.com/Alonza0314/nsctl.git
cd nsctl
make

After built, the binary file, nsctl, will be placed in the build directory.

Command Description

• ns series

  Command	Description
  nsctl ns create <name>	Create a new namespace
  nsctl ns delete <name>	Delete a namespace
  nsctl ns list	List all namespaces

• net series

  Command	Description
  nsctl net connect <ns1> <ns2>	Connect two namespaces
  nsctl net disconnect <ns1> <ns2>	Disconnect two namespaces
  nsctl net list <ns>	List interfaces in a namespace
  nsctl net set-ip <ns> <if> <ip>	Set IP address of an interface
  nsctl net up <ns> <if>	Bring an interface up
  nsctl net down <ns> <if>	Bring an interface down

• exec series

  Command	Description
  nsctl exec <ns> -- <cmd>	Execute a command in a namespace

• describe series

  Command	Description
  nsctl describe <ns>	Describe a namespace

• topo series

  Command	Description
  nsctl topo apply <file>	Apply a topology from a file
  nsctl topo delete <file>	Delete a topology from a file