sigma command not found

Introduction

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

sigma: command not found

or when using sudo you get the following error message

sudo: sigma: command not found

Solutions to sigma: command not found

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

In Ubuntu sigma is provided by sigma-align package.

sigma-align is:

Sigma (“Simple greedy multiple alignment”) is an alignment program. It’s algorithm and scoring scheme are designed specifically for non-coding DNA sequence.

It uses a strategy of seeking the best possible gapless local alignments. This happens at each step making the best possible alignment consistent with existing alignments. It scores the significance of the alignment based on the lengths of the aligned fragments and a background model. These may be supplied or estimated from an auxiliary file of intergenic DNA.

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

sudo apt-get -y install sigma-align

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

You can also use apt command to install sigma-align.

sudo apt -y install sigma-align

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

sudo aptitude install sigma-align

Summary

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