I'm using currently Ubuntu 12.04 LTS as a host machine, and I've virtualized three machines:
All the guests have the same VirtualBox default settings, but Ubuntu 12.10 is slower!
The installation took 1h 40 min! (Normally, it takes 40 minutes.) Now it is impossible to use it, and all operations are very, very slow.
I'm using VirtualBox version 4.2.4.
Any ideas?
Why is it slow? And how can I make it faster?
I followed the steps for sharing folders between Windows 7 and Ubuntu in VirtualBox.
Despite that the folder appears with a X sign and gives me the following message when a try to open it:
The folder content could not be displayed
When I choose Shared Folder from the VirtualBox Device menu, the following warning is displayed:
On the system page, you have assigned more than 50% of your computer's memory (2.93 GB) to the virtual machine...
How can I successfully share folders between Windows and Ubuntu using VirtualBox?
I have run out of space on my WinXP virtual machine, which I only gave 10 GB space for when I created it. Is there an easy way to increase it to, say, 20 GB? I can't see any obvious option in VirtualBox settings.
The suggestion below gives this error
wim@wim-ubuntu:/media/data/winxp_vm$ VBoxManage modifyhd wim.vdi --resize 20000
VBoxManage: error: Cannot register the hard disk '/media/data/winxp_vm/wim.vdi' {46284957-2c09-4e70-8a49-bfbe0f7f681d} because a hard disk '/home/wim/VirtualBox VMs/winxp_vm/wim.vdi' with UUID {46284957-2c09-4e70-8a49-bfbe0f7f681d} already exists
VBoxManage: error: Details: code NS_ERROR_INVALID_ARG (0x80070057), component VirtualBox, interface IVirtualBox, callee nsISupports
Context: "OpenMedium(Bstr(pszFilenameOrUuid).raw(), enmDevType, AccessMode_ReadWrite, fForceNewUuidOnOpen, pMedium.asOutParam())" at line 210 of file VBoxManageDisk.cpp
Removing the .vdi from VirtualBox before calling VBoxManage command, then adding it back in, was successful. But now I can't boot the virtual machine, I get this worrying screen:
By the way, it says FATAL: Could not read from the boot medium! System halted.
The vdi must be reattached to the VM after VBoxManage command. Further, the partition will need to be resized from WITHIN windows, because you will have this empty space:
I was able to resize the partition easily using a bit of freeware called EASEUS Partition Master 9.1.0 Home Edition.
I've recently installed Ubuntu on Oracle's Virtualbox. Now I want to install the guest additions.
I started up my Ubuntu guest OS, clicked "Devices" and chose "Install Guest Additions". Nothing happened, and I don't see the CD icon on my desktop.
How can I make this work?
I've just installed Ubuntu 10.04 into VirtualBox on Windows 7.
Unfortunately the only options showing for screen resolution are 640x480 and 800x600 and the monitor is showing as 'Unknown'.
How would I go about upping the resolution to 1280x1024 (I'm on a 1600x1200 monitor)?
Update
I tried mounting the VirtualBox 'Guest Additions' ISO (from the VBox 'Devices' menu) and doing sudo sh ./VBoxLinuxAdditions-x86.run
from the mounted drive, which gave 2 new listed resolutions after a reboot (1024x768 and the 16:9 version of that resolution). These worked when I selected them but disappeared when I switched back to another resolution. I tried rebooting and running VBoxLinuxAdditions-x86.run again but onlu the 2 low res options listed this time.
I think I'm going to reinstall...
Seems to be a VBox problem rather than an Ubuntu problem as after reinstalling 10.4 overwriting the original virtual partition, sudo sh ./VBoxLinuxAdditions-x86.run now has no affect at all.