psfex command not found

Introduction

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

psfex: command not found

or when using sudo you get the following error message

sudo: psfex: command not found

Solutions to psfex: command not found

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

In Ubuntu psfex is provided by psfex package.

psfex is:

Extract models of the Point Spread Function (PSF) from FITS images processed with SExtractor, and measures the quality of images. The generated PSF models can be used for model-fitting photometry or morphological analyses.

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

sudo apt-get -y install psfex

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

You can also use apt command to install psfex.

sudo apt -y install psfex

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

sudo aptitude install psfex

Summary

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