Share files between two SO is easy because there are different protocols for sharing resources (NFS, CIFS/SMB/Samba, FTP, …), but sharing files between two PCs with OS Linux based, and one of them as virtualmachine guest of another one is a bit more complicated. Here’s how to do it when we Mac OSX as HOST and CentOS as GUEST:

Mount DVD ISO image in CentOS VirtualBox guest

1.- Previously, I have download DVD ISO image, then I have copied to my Mac OSX Host. 2.- From Virtual Box menu, goes to Devices > CD/DVD Devices and mount selecting CentOS’s DVD ISO image (ISO previuosly added to VBox’s “Virtual Media Manager”).

3.- In CentOS guest now you can see DVD iso mounted as /media/CentOS_5.5_Final 4.- You can install packages directly off the mounted DVD ISO. Now, modify /etc/yum.repos.d/CentOS-Media.repo file, enter: [root@localhost ~]# vi /etc/yum.repos.d/CentOS-Media.repo 5.- Make sure enabled is set to 1: enabled=1 6.- Save and close the file. To install packages from only DVD media repo, do this: [root@localhost ~]# yum –disablerepo=* –enablerepo=c5-media -y install _ Notes:

  • –disablerepo=*: disable all yum repo
  • -y: assume yes to any question which would be asked
  • –enablerepo=c5-media: enable c5-media repo

Install Virtual Box Additions in CentOS guest

Before anything, It is necessary install some packages as compiler gcc, kernel libs and sources. 1.- Install the following packages with CentOS DVD ISO image mounted: [root@localhost ~]# yum –disablerepo=* –enablerepo=c5-media -y install gcc
[root@localhost ~]# yum –disablerepo=* –enablerepo=c5-media -y install kernel sources
[root@localhost ~]# yum –disablerepo=* –enablerepo=c5-media -y install kernel-devel 2.- Unmount CentOS DVD ISO image and mount Virtual Box Guest Additions in your CentOS guest:

3.- Restart CentOS guest 4.- Now, install VBoxGuestAdditions in CentOS guest: [root@localhost ~]# cd /media/VBOXADDITIONS_3.2.6_63112/
[root@localhost VBOXADDITIONS_3.2.6_63112]# sh 5.- Restart CentOS guest again 6.- Now you could use special functionalities as resize the guest windows, share files, etc…

Share files beetwen Mac OS X as Host and CentOS as Guest

1.- In your Host Linux box: $ mkdir /Users/chilcano/files2share 2.- In main menu of your Linux Guest’s Virtual Box:

  • Go to Devices > Shared Folders
  • In popup, add shared folder and select Host’s folder ( /Users/chilcano/files2share ), set up a name as files2share and make permanent.

3.- In your Guest Linux box opens a terminal window and create a new directory where you’ll mount shared folder [root@localhost /]# mkdir /vbox_shared 4.- In this terminal, enter the id command and look the output. We will use uid and gid: [root@localhost /]# id uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel) context=root:system_r:unconfined_t:SystemLow-SystemHigh 5.- Now, we will mount shared folder from Host to Guest. From terminal in Guest Linux: [root@localhost /]# mount -t vboxsf -o uid=0,gid=0 files2share /vbox_shared

Make the Mounted Share permanent

You can make the shared folder mount automatically each time you start the CentOS guest by making an entry in /etc/fstab. 1.- From the CentOS guest edit fstab: [root@localhost ~]# sudo gedit /etc/fstab 2.- Add a line at the bottom of file, and that looks like this: files2share /vbox_shared vboxsf rw,uid=0,gid=0 0 0 3.- Verify mounted folder In Mac OS X (host):

In CentOS (guest):

4.- End. References :

  • CentOS: Install Packages Via yum Command Using DVD / CD as Repo
  • Implementing virtualbox shared folders between a Mac OS X host and Fedora guest
  • How to install Guest Additions in CentOS 5.1
  • Share Folders Between a Linux Host and Linux Virtual Machine on VirtualBox