May I suggest another point to add to this section?
The version of the extension pack in the AUR is sometimes ahead of the version of virtualbox in Manjaro, so it’s best to check before installing.
I do it with these commands:
vboxmanage --version
pikaur -S virtualbox-ext-oracle
Example:
[xxx]$ vboxmanage --version
6.1.14r140239
[xxx]$ pikaur -S virtualbox-ext-oracle
...
virtualbox-ext-oracle 6.1.8-1 -> 6.1.14-1
:: Proceed with installation? [Y/n]
EDIT: since I first wrote this post, linux-aarhus added this to his post:
$ pamac search virtualbox-ext-oracle
virtualbox-ext-oracle-manjaro ...
Notice “virtualbox-ext-oracle-manjaro”.
Then I discovered that pikaur and yay can search too, eg :
$ pikaur -Ss virtualbox-ext-oracle
also brings up “virtualbox-ext-oracle-manjaro”
If ‘virtualbox-ext-oracle-manjaro’ always has the right version,
then if you use it, the rest of this post is redundant.
While Manjaro was on 6.12, Arch and AUR were on 6.14,
so I did not install virtualbox-ext-oracle from AUR.
I did install it, this way:
Got the 6.12 ext pack from
https://www.virtualbox.org/wiki/Download_Old_Builds
then install it via
sudo vboxmanage extpack install --replace <name>.vbox-extpack
Actually, I did not myself use that command either, so i can’t guarantee that it works.
I found it only today, in https://forum.manjaro.org/t/unable-to-install-module-vboxhost-6-1-14-ose-for-kernel-5-4-64-1-manjaro-missing-kernel-headers/24504/4]
What I did use was the GUI, like this:
Open the GUI with sudo:
sudo /usr/lib/virtualbox/VirtualBox
then go into file > preferences > extensions, and it’s obvious what to do there.
Close that GUI, then open it the usual way (without sudo) before you try to use it.