ols command not found

Introduction

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

ols: command not found

or when using sudo you get the following error message

sudo: ols: command not found

Solutions to ols: command not found

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

In Ubuntu ols is provided by speech-tools package.

speech-tools is:

This package contains the various highly useful utility programs that use and accompany the Edinburgh Speech Tools Library. Audio software and some basic signal processing software is included in this package.

The following programs are available: na_play: generic playback program for use with net_audio and CSTR ao. ch_wave: Waveform file conversion program. ch_lab: label file conversion program. ch_track: Track file conversion program. wagon: a CART tree build and test program

See /usr/share/doc/speech-tools/README for detail list of programs available.

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

sudo apt-get -y install speech-tools

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

You can also use apt command to install speech-tools.

sudo apt -y install speech-tools

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

sudo aptitude install speech-tools

Summary

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