run_perftest_loopback command not found

Introduction

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

run_perftest_loopback: command not found

or when using sudo you get the following error message

sudo: run_perftest_loopback: command not found

Solutions to run_perftest_loopback: command not found

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

In Ubuntu run_perftest_loopback is provided by perftest package.

perftest is:

This is a collection of tests written using Infiniband verbs intended for use as a performance micro-benchmark. The tests can measure the latency and bandwidth of Infiniband fabrics.

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

sudo apt-get -y install perftest

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

You can also use apt command to install perftest.

sudo apt -y install perftest

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

sudo aptitude install perftest

Summary

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