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Hanisch 11-14-2020 06:38 AM
GuestAdditions do not work in CentOS-VM
 
Hello,

in my CentOS 8 installation in a VirtualBox 6.1.16 the GuestAddition (Shared-folder and bidirectional clipboard) do not work.
I have installed GuestAdditions in /opt/VBoxGuestAdditions-6.1.16.

Code:
$ sudo mount -t vboxsf -o rw,uid=1000,gid=1000 transfer /home/opa/Shared_transfer
mount: /home/opa/Shared_transfer: Falscher Dateisystemtyp, ungültige Optionen, der Superblock von transfer ist beschädigt, fehlende Kodierungsseite oder ein anderer Fehler.

What is the reason for that?

with regards
Ch. Hanisch

michaelk 11-14-2020 09:00 AM
I have CentOS 8 running in a VirtualBox VM with guest additions installed and both shared folders / clipboard work fine. Have you verified the vboxsf module is loaded? Check the output of the lsmod command and that there is a vboxsf filesystem.
Code:
Module                  Size  Used by
vboxsf                86016  0
vboxguest            385024  7 vboxsf
cat /proc/filesystems | grep vboxsf
Code:
nodev        vboxsf
Is your transfer share a temporary or permanent share?

Hanisch 11-15-2020 04:55 AM
Quote:
Originally Posted by michaelk (Post 6185185)
... Check the output of the lsmod command and that there is a vboxsf filesystem.
Code:
Module                  Size  Used by
vboxsf                86016  0
vboxguest            385024  7 vboxsf
Quote:
cat /proc/filesystems | grep vboxsf
Code:
nodev        vboxsf
That is Ok.
Code:
$ lsmod
...
vboxguest        385024  0
...
$ sudo modprobe vboxsf
$ lsmod
...
vboxguest        385024  1 vboxsf
...
$ sudo modprobe vboxdrv
modprobe: FATAL: Module vboxdrv not found in directory /lib/modules/4.18.0-193.28.1.el8_2.x86_64
No explicite entry for vboxsf
How can I activate vboxsf?

with regards
Ch. Hanisch

Hanisch 11-15-2020 06:39 AM
Hello,
>How can I activate vboxsf?

The solution is the execution of following skript:
Code:
$ cat ~/usr/VBoxadd-setup
cd /opt/VBoxGuestAdditions-*/init 
sudo ./vboxadd setup

# Oder auch:
sudo modprobe -a vboxguest vboxsf vboxvideo
Now all is Ok.
Code:
$ lsmod
Module                  Size  Used by
vboxsf                86016  2
...
vboxguest            385024  5 vboxsf
with regards
Ch. Hanisch


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