Hola
esto encontre en un foro de centos es un extracto del manual de VirtualBox lo malo esdta en ingles pero no se ve muy dificil, yo ocupo xen, y virtual box en ubutu....
From VirtualBox manual:
11.4.6 USB not working If USB is not working on your Linux host, make sure that the current user has permission to access the USB filesystem (usbfs), which VirtualBox relies on to retrieve valid information about your host’s USB devices.
As usbfs is a virtual filesystem, a chmod on /proc/bus/usb has no effect. The permissions for usbfs can therefore only be changed by editing the /etc/fstab file. For example, most Linux distributions have a user group called usb or similar, of which the current user must be a member. To give all users of that group access to usbfs, make sure the following line is present: # 85 is the USB group none /proc/bus/usb usbfs devgid=85,devmode=664 0 0 Replace 85 with the group ID that matches your system (search /etc/group for “usb” or similar). Alternatively, if you don’t mind the security hole, give all users access to USB by changing “664” to “666”. The various distributions are very creative from which script the usbfs filesystem is mounted. Sometimes the command is hidden in unexpected places. For SuSE 10.0 the mount command is part of the udev configuration file /etc/udev/rules.d/50-udev.rules. As this distribution has no user group called usb, you may e.g. use the vboxusers group which was created by the VirtualBox installer. Since group numbers are allocated dynamically, the following example uses 85 as a placeholder. Modify the line containing (a linebreak has been inserted to improve readability) DEVPATH="/module/usbcore", ACTION=="add", RUN+="/bin/mount -t usbfs usbfs /proc/bus/usb" and add the necessary options (make sure that everything is in a single line): DEVPATH="/module/usbcore", ACTION=="add", RUN+="/bin/mount -t usbfs usbfs /proc/bus/usb -o devgid=85,devmode=664" Debian Etch has the mount command in /etc/init.d/mountkernfs.sh. Since that distribution has no group usb, it is also the easiest solution to allow all members of the group vboxusers to access the USB subsystem. Modify the line domount usbfs usbdevfs /proc/bus/usb -onoexec,nosuid,nodev so that it contains domount usbfs usbdevfs /proc/bus/usb -onoexec,nosuid,nodev,devgid=85,devmode=664 As usual, replace the 85 with the actual group number which should get access to USB devices. Other distributions do similar operations in scripts stored in the /etc/init.d directory.
Suerte.
Espero te ayude.
Atte.
Mario Ganga Castro.
2009/3/17 Julio Martinez hulyom@yahoo.com
Monica,
Si tu objetivo es solamente crear Maquinas virtuales en tu maquina que tiene ya CentOS, entonces seria mejor que utilices Xen, el kernel de Xen y obviamente escogiendo el kernel Xen cuando GRUB te da la opcion al arranque
Saludos
Julio ________________
Hola a todos: Tengo un pequeño problemilla con VirtualBox... instalado sobre CentOs..... Última versión de CentOS, última versión de VirtualBox. mi problema es qeu no consigo que reconozca los USB.... si alguno sabéis alguna manera....agradecería que me comentéis como va!! Ya qeu no se como haceeeerlooooo...sniff!! Muchas gracias a todos!!
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