I want to share a folder between my host windows7 and guest Ubuntu but whenever I select add guest additions I get the following error:     Unable to mount the CD/DVD image   C:\PROGRA~1\Oracle\VIRTUA~1\VBoxGuestAdditions.iso on the machine   Ubuntu. Would you like to force mounting of this medium?      Could not unmount the currently mounted media/drive   (VERR_PDM_MEDIA_LOCKED).   What should I do?  I got the following message on the terminal: ... Building the main guest additions module...done! Building the shared folder support module....fail!  Atleast tell me how I can enable copy and paste between the host and guest. I have changed the settings to bidirectional but still the copy/paste is not working
20441
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?
58224
@enzotib mentioned the following command  sudo mount -o remount,rw /cdrom   Does this imply I can mount a CD or DVD in rw mode and use like a (real) filesystem? Does this work with the popular ISO-9660 filesystem, which is read-only by design? Will this create a multsession CD with one session per change (or per mount)?  Would this work (differently) on a ISO image file on a read/write filesystem?
80198
I am newbie to VM concept. actually i have installed DOS6.22 under virtualbox and using 32bit windows 7 OS as HOST Operating System, now i want to copy some folders/files from HOST OS to DOS6.22 Guest OS. how can i copy.?
86611
I ran these commands:  VBoxManage clonehd d6b9f0a5-98df-48ca-83c8-91a0809ec349 --format RAW Debian.raw sudo dd if=~/.VirtualBox/HardDisks/Debian.raw of=/dev/sda5   When I try to mount the partition, I get this complaint:  EXT4-fs (sda5): VFS: Can't find ext4 filesystem   Now I know that the VM had an ext4 partition. What did I do wrong?
110369
I was installing 32-bit Ubuntu(ubuntu-10.10-desktop-i386.iso) on VMWare workstation 7.1. During installation an error came up with the following text.  (initramfs) mount: mounting dev/loop0 on //filesystem.squashfs failed: Input/Output error Can not mount /dev/loop0 (/cdrom/casper/filesystem.squashfs) on //filesystem.squashfs   I did a memory test which was successful, but when selecting "Try Ubuntu without installing", "Install Ubuntu" or "Check disk for defects" the same error is showing up.  I download the ISO image from Ubuntu website "http://www.ubuntu.com/desktop/get-ubuntu/download". As I couldn't find the checksum data, the ISO image was verified by mounting to a virtual drive and browsing the contents.  The ISO image is mounted to a virtual drive in VMWare and not burnt to a CD.
115680
As part of the installation step of some software on a Ubuntu VM I'd like to create a samba share. How would I go about doing that from the command line?
97547
I cannot see any USB devices within my VirtualBox guest VMs from my host. How do I enable access for my guest VMs?  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
17357
I would like to transfer files between two remote hosts using on local shell, but it seems rsync doesn't support synchronisation if two remotes are specified as follow:  $ rsync -vuar host1:/var/www host2:/var/www The source and destination cannot both be remote.   What other workarounds/commands I could use to achieve similar results?
8062
My Ubuntu 12.04.1 running on virtualbox ran out of space while I was installing software on it and now it is . I've got files I need to recover from it. I have the ubuntu64.vdi file on my Windows 7 (host) laptop and I was wondering if there is any way of recovering the files from the vdi file. In parallel, I generated a fresh 12.04.1 machine on virtualbox in the same laptop, and I'll use that one instead of the borked one. I can add the borked vdi to the list of disks in the working one. Then I used gnome nautilus to mount the borked disk. I can find the files in there, but they are about 2 months old. I think this coincides with the last time that I did a virtualbox snapshot of the machine, but not the last time I got a working machine, which was yesterday. Is there any way of mounting the vdi as of yesterday, just before it crashed? EDITED: Here is what Virtual Media Manager tells me about my ubuntu64.vdi file:  EDITED2: I copied my ubuntu.vdi to an external USB with plenty of disk space. I tried using Windows to clone it, but got an error:  I tried the same from the working VM via a shared folder of the USB drive, and it started the cloning. Took a good while, but finished successfully: root@precise64:/media/sf_E_DRIVE/copy_of_ubuntu64_vm_folder_20140224/ubuntu64#  VBoxManage clonehd ubuntu64.vdi ubuntu64.raw --format RAW 0%...  10%...20%...30%...40%...50%...60%...70%...80%...90%...100% Clone hard disk created in format 'RAW'. UUID: 90f99198-18e1-40ee-85fe-c083dcbb1ac3  EDITED3: After creating the raw file, I run testdisk with Deeper Search, I get a list like this:  Ater Deeper Search has finished, I get a list like this:  But I don't know which one is which snapshot... Any ideas?
49639
I'm trying to connect two PCs for desktop sharing, I was able to set up ssh shell and file sharing but I failed to connect to VNC server.  There are additional packages that I need to install on my machines?  And how should I fill this dialog:
13193
I have a Windows Cluster made up of two nodes connected via SAS to a storage array. I have two virtual machines configured with their hard disks (vhdx) on the shared storage. They are up and running correctly. Now I need to build a "shared volume" between these two vm, that is a disk with files and folders in, that can be accessed from both servers, like an smb share. I understood that it was possible creating a vhdx file on the shared storage and then attaching it to both vm flagging "enable virtual hard disk sharing" but I think I misunderstood something. Can you tell me if this is realizable or not, end eventually what's the best practice to reach my goal? I basically need a storage accessible simultaneously from two virtual machines, possibly without setup a separate file server to expose smb shares.
26382
ubuntu with xfce (xubuntu) or lxde (lubuntu) on virtualbox and guest additions installed and clipboard sharing set to bidirectional does not allow plain text to be copied/pasted to/from the virtual and the host system; what else needs to be configured?  note - this is an issue across multiple releases of ubuntu; on some it appears to work partially; I have not found a lubuntu where it works; as if something basic in lubuntu causes copy/paste of plain text to not work
83037
I recently upgraded from Mint 12 to Ubuntu 12.10 + Cinnamon.  I have an external usb drive that when I plug it in, automatically mounts to /media/[username]/Backup/.  Thing is, under Mint, it didn't include the [username] portion.  It just mounted to /media/Backup.  My question is, how do I switch back to that format?  I don't need the drive mounted under my username.  Just under media.  Thanks in advance.
94985
I want to mount one of my media folders of my Synology DiskStation (DS414J, DSM 6.2) on my laptop (Manjaro running on Kernel 4.17.18) via SMB/CIFS. I set up a DiskStation user called media that has read/write access to this specific folder. I mount the folder with the following /etc/fstab entry:   //{disk station IP}/{folder}/ /home/{user}/NAS/{folder} cifs auto,x-systemd.automount,cache=none,rsize=130048,wsize=57344,users,user=media,pass={the password},workgroup=WORKGROUP,ip={disk station IP} 0 0   Mounting and read access works (I can access the files and e.g. play them with VLC) with the regular user. However, when I try to perform any write operations, I get "Permission denied" error.  Output of ls -la on the share shows following:  drwxr-xr-x 2 root root    0 01. Jan 2018   . drwxr-xr-x 2 root root    0 01. Jan 2018   .. -rwxr-xr-x 1 root root 5,8M 01. Jan 2018  '01.file' -rwxr-xr-x 1 root root 3,7M 01. Jan 2018  '02.file' -rwxr-xr-x 1 root root 3,2M 01. Jan 2018  '03.file'   How do I configure my laptop to allow my regular user to have read/write access to the share?
68345
I tried to mount my Ubuntu 13.04 64-bit image using the following command :     sudo mount -o rw,loop /home/varun/Downloads/ubuntu-13.04-desktop-amd64.iso /media/cdimage   But I gets the following warning :     mount: warning: /media/cdimage seems to be mounted read-only.      Help me to eliminate the warning.
119938
I want to share my home folder with my Windows machine, but I have no idea how to share the folder.  I can't find any up-to-date guides on Google, so how can I share my home directory?
30903
Where is the configuration option for sharing clipboards (copy &amp; paste) between the host OS and the guest OS?