9umount command not found

Introduction

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

9umount: command not found

or when using sudo you get the following error message

sudo: 9umount: command not found

Solutions to 9umount: command not found

How To Fix 9umount: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu 9umount is provided by 9mount package.

9mount is:

9mount is a set of SUID mounting tools for use with v9fs to help cope with Linux’s poor mount support.

The tools offer a level of security - 9mount will only let you mount over non-sticky directories you have write access to, and 9umount will only let you unmount 9p partitions that you mounted yourself.

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

sudo apt-get -y install 9mount

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

You can also use apt command to install 9mount.

sudo apt -y install 9mount

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

sudo aptitude install 9mount

Summary

In this tutorial we learn how to fix 9umount command not found error in Ubuntu / Debian / Kali Linux or Raspbian distribution.