File permissions

[krikuku]

I am migrating to ubuntu 8.04 and I am currently doing a virtual machine setup. I am using virtualbox ose.

I have setup a virtual machine for backtrack beta 3. I had not changed write permissions for /dev/vboxdrv, so virtualbox displayed an error:


The VirtualBox kernel driver is not accessible to the current user. Make sure that the user has write permissions for /dev/vboxdrv by adding them to the vboxusers groups. You will need to logout for the change to take effect..

I did as told, and the virtual machine launched correctly without errors, until next power off.

Apparently ubuntu automatically resets the write permissions for /dev/vboxdrv at startup. (Bug?)

How do i permanently change write permissions for /dev/vboxdrv?

[bluefrog]

if you have added your user to the vboxusers group, there is no reason it shouldn't work.

[krikuku]

I had not added my user to the vboxusers group. I searched around a bit, and found a simple way to do so:

su [insert favorite text editor] /etc/group

...
haldaemon:x:123:
kristian:x:1000:
vboxusers:x:124:kristian

Thank you for the help!

[bluefrog]

the simple way is to use the tools made to do so.

graphically
syst/admin/users and group

command line
sudo gpasswd -a user vboxusers