ergo command not found

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

Introduction

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

ergo: command not found

or when using sudo you get the following error message

sudo: ergo: command not found

Solutions to ergo: command not found

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

In Ubuntu ergo is provided by ergo package.

ergo is:

ErgoSCF is a quantum chemistry program for large-scale self-consistent field calculations. It employs modern linear scaling techniques like fast multipole methods, hierarchic sparse matrix algebra, density matrix purification, and efficient integral screening. Linear scaling is achieved not only in terms of CPU usage but also memory utilization. It uses Gaussian basis sets.

It can compute single-point energies for the following methods:

  • Restricted and unrestricted Hartree-Fock (HF) theory
  • Restricted and unrestricted Kohn-Sham density functional theory (DFT)
  • Full Configuration-Interaction (FCI)

The following Exchange-Correlational (XC) density functionals are included:

  • Local Density Approximation (LDA)
  • Gradient-corrected (GGA) XC functionals BLYP, BP86, PW91 and PBE
  • Hybrid XC functionals B3LYP, BHandHLYP, PBE0 and CAMB3LYP

Further features include:

  • Linear response calculations (polarizabilities and excitation energies) for restricted reference densities
  • External electric fields
  • Electron dynamics via Time-Dependent Hartree-Fock (TDHF)

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

sudo apt-get -y install ergo

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

You can also use apt command to install ergo.

sudo apt -y install ergo

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

sudo aptitude install ergo

Summary

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