bl2seq command not found

Introduction

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

bl2seq: command not found

or when using sudo you get the following error message

sudo: bl2seq: command not found

Solutions to bl2seq: command not found

How To Fix bl2seq: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu bl2seq is provided by ncbi-blast+-legacy package.

ncbi-blast+-legacy is:

This package adds some fake scripts to call NCBI+ programs with the NCBI blast command line. It makes use of the legacy_blast script in ncbi-blast+ package.

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

sudo apt-get -y install ncbi-blast+-legacy

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

You can also use apt command to install ncbi-blast+-legacy.

sudo apt -y install ncbi-blast+-legacy

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

sudo aptitude install ncbi-blast+-legacy

Summary

In this tutorial we learn how to fix bl2seq command not found error in Ubuntu / Debian / Kali Linux or Raspbian distribution.