Question

7

Accessing shared folder on Virtualbox 6.1 - Windows 10 host - Ubuntu 20.04 SERVER guest

rated 0 times [ 7] [ 0] / answers: 1 / hits: 16884 / 2 Years ago, thu, february 3, 2022, 2:35:49

I believe I did everything what was described on how to access a folder on my host - Windows 10 - from my guest - ubuntu 20.04.
However I get no results.

Guest additions are installed on my VM :

The settings for shared folder :

Installed the latest Guest Additions CD

However, when I cd into my folder and list files there's nothing there. And I do keep a file there on my host, so it should be seen:

tomas@ubuntu20:~/share$ ls -l

total 0

tomas@ubuntu20:~/share$ df -t vboxsf

df : no file systems processed 

tomas@ubuntu20:~/share$ usermod -aG vboxsf tomas

usermod : group 'vboxsf' does not exist

tomas@ubuntu20:~/share$ chmod 755 .

tomas@ubuntu20:~/share$ ps -ef | grep -i vbox

root         385       2  0 10:19 ?        00:00:00 [iprt-VBoxWQueue]

tomas       1112    1098  0 10:24 pts/0    00:00:00 grep --color=auto -i vbox

tomas@ubuntu20:~/share$ service --status-all | grep -i virtual # no output

tomas@ubuntu20:~/share$ sudo mount -t vboxsf -o uid=1000,gid=1000 ubuntush /home/tomas/share

mount: /home/tomas/share: wrong fs type, bad option, bad superblock on ubuntush, missing codepage or helper program, or other error.

From Windows 10(host) Command Prompt:

C:Usersas_to>VBoxManage sharedfolder add "ubuntu20" --name "ubuntush" --hostpath "C:Usersas_toDesktopubuntush"

VBoxManage.exe: error: Shared folder named 'ubuntush' already exists

VBoxManage.exe: error: Details: code VBOX_E_OBJECT_IN_USE (0x80bb000c), component SessionMachine, interface IMachine, callee IUnknown

VBoxManage.exe: error: Context: "CreateSharedFolder(Bstr(pszName).raw(), Bstr(szAbsHostPath).raw(), fWritable, fAutoMount, Bstr(pszAutoMountPoint).raw())" at line 1194 of file VBoxManageMisc.cpp

Does anybody know what is missing ?

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answered 2 Years ago hamostic · Accepted Answer

With a help of great @FedonKadifeli I was able to solve the issue.

First and foremost - the guest OS is Ubuntu 20.04 LTS Server.

From a running guest OS window install Guest Additions. Go to :
Devices - > Insert Guest Additions CD Image

Then to the guest OS command line :

sudo apt update

sudo apt upgrade



sudo mount /dev/sr0 /cdrom

mount: /cdrom: WARNING: device write-protected, mounted read-only. # This is OK



cd /cdrom 

sudo bash ./VBoxLinuxAdditions.run

The output of the last command should be something like that :

However, the last 3 lines of the output I got was saying this :

"This system is currently not set up to build kernel modules.

Please install the gcc make perl packages from your distribution.

VirtualBox Guest Additions: Running kernel modules will not be replaced until

the system is restarted"

So, first I had to install additional packages. And anything extra that may be needed:

sudo apt install gcc 

sudo apt install make

sudo apt install perl

Restart the guest :

reboot

Then from a Guest OS window go to :

Devices - Shared Folders - Shared Folders Settings - Add new Shared Folder :

Folder Path : C:Usersas_toDesktop oo

Folder Name : foo

Mount point : /home/tomas/bar - This will create a directory after you close this window

Auto-mount (check)

Make Permanent (check)

Press OK to close the window.

Next, if you try to cd into bar you will get permission denied :

cd bar/

-bash: cd: bar/: Permission denied

Add user to the group "vboxsf" and logout/login again for the changes to be applied:

sudo usermod -aG vboxsf tomas

logout

And that's it. All should work now.
Thank you again @FedonKadifeli, awesome guy.