ng

Create a new Angular application inside a directory

$ ng new [project_name]

$ ng generate component [component_name]

$ ng generate class [class_name]

$ ng generate directive [directive_name]

$ ng serve

$ ng build

$ ng test

$ ng version

ng [options] device

-i interface
    Listen on the specified network interface.

-r file
    Read data from the specified file, which must contain previously captured NetFlow data.

-l addr
    Listen on the specified addr for Netflow traffic.

-w file
    Write captured traffic to file.

-q
    Quiet output (only display statistics).

-v level
    Set verbosity level (0-3, default 1).

-h
    Display help message and exit.

The `ng` command is a network traffic analyzer that provides detailed information about network flows based on NetFlow data. It's a command-line tool designed to capture, analyze, and report on network traffic statistics, aiding in network monitoring, troubleshooting, and security analysis. It is used primarily to analyze network traffic from devices exporting flows like Cisco Routers. It can work with v5, v9 and ipfix data formats.

The `ng` command relies on NetFlow data being properly configured and exported from network devices. Accuracy of analysis depends heavily on the quality and completeness of the NetFlow records.

Understanding NetFlow data is crucial for effective analysis with `ng`. Key fields include source/destination IP addresses, ports, protocol, and packet/byte counts. Understanding IP headers is important
The tool focuses on summarizing flows rather than providing raw packet captures.

The specific history of the `ng` command is not widely documented in readily available resources. Tools of this nature came into being with the deployment of netflow monitoring with the original intent of capturing utilization data for billing purposes. Over time these technologies and the tooling has been expanded for monitoring and security analytics.

tcpdump(1), wireshark(1)