ner command not found

In this troubleshooting guide we learn how to fix ner command not found error message

Introduction

When you run more command in linux terminal / console, you get the following error message

ner: command not found

or when using sudo you get the following error message

sudo: ner: command not found

Solutions to ner: command not found

How To Fix ner: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu ner is provided by frog package.

frog is:

Memory-Based Learning (MBL) is a machine-learning method applicable to a wide range of tasks in Natural Language Processing (NLP).

Frog is a modular system integrating a morphosyntactic tagger, lemmatizer, morphological analyzer, and dependency parser for natural languages. It is based upon it’s predecessor TADPOLE (TAgger, Dependency Parser, and mOrphoLogical analyzEr). Using Memory-Based Learning techniques, frog tokenizes, tags, lemmatizes, and morphologically segments word tokens in incoming UTF-8 text files, and assigns a dependency graph to each sentence. Frog is particularly targeted at the increasing need for fast, automatic NLP systems applicable to very large (multi-million to billion word) document collections that are becoming available due to the progressive digitization of both new and old textual data. Up to now, frog has only been tested and used using corpora of Dutch natural language (see the frogdata package for samples).

Frog is a product of the Centre of Language and Speech Technology at Radboud University Nijmegen, it subsumes previous work by the ILK Research Group (Tilburg University, The Netherlands) and the CLiPS Research Centre (University of Antwerp, Belgium).

If you do scientific research in NLP, Frog will likely be of use to you.

To fix this problem, we can install more using the command below.

sudo apt-get -y install frog

This command might take some time to finish depending on your machine internet connection.

You can also use apt command to install frog.

sudo apt -y install frog

Or if you have aptitude installed you can use the following command.

sudo aptitude install frog

Summary

In this tutorial we learn how to fix ner command not found error in Ubuntu / Debian / Kali Linux or Raspbian distribution.