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I have VirtualBox emulating a Linux system on my Windows machine, and I'm quite happy with that. As I'm running out of memory space on my Linux VM, I'd like to know if it's possible to increase space allocated to the Linux partition. How?

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  • if virtual box allows you to increase the disk size then you could use gparted(or parted if you dare) to try actually increase the partition. that's what I do with VMWare anyway.
    – Michael
    Jul 12, 2013 at 8:50

2 Answers 2

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I think this is what you are looking for :

http://www.techrepublic.com/blog/smbit/extending-partitions-on-linux-vmware-virtual-machines/286

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here are the steps I followed to extend my Linux partitions.  This only applies to ext3 disks that use the logical volume manager.  If you’re running a RedHat, CentOS or other similar Linux distro, this process will work for you.

  1. Shutdown the VM

  2. Right click the VM and select Edit Settings

  3. Select the hard disk you would like to extend

  4. On the right side, make the provisioned size as large as you need it

  5. Click OK

  6. Power on the

  7. Connect to the command line of the Linux VM via the console or putty session

  8. Log in as root

  9. The fdisk command provides disk partitioning functions and using it with the -l switch lists information about your disk partitions.  At the command prompt type fdisk -l

  10. The response should say something like Disk /dev/sda : xxGB. (See Figure A)

  11. At the command prompt type fdisk /dev/sda. (if dev/sda is what was returned after step 10 as shown in Figure A)

  12. Type p to print the partition table and press Enter (also shown in Figure A)

  13. Type n to add a new partition

  14. Type p again to make it a primary partition

  15. Now you’ll be prompted to pick the first cylinder which will most likely come at the end of your last partition (ex: /dev/sda3 ends at 2610).  So I chose 2611 for my first cylinder, which is also listed as the default.

  16. If you want it to take up the rest of the space available (as allocated in step 4), just choose the default value for the last cylinder.

  17. Type w to save these changes

  18. Restart the VM

  19. Log back in as root

  20. At the command prompt type fdisk -l. You’ll notice another partition is present.  In Figure B it is listed as sda4.

  21. You need to initialize this new partition as a physical volume so you can manipulate it later using the Logical Volume Manager (LVM).

  22. Now you’ll add the physical volume to the existing volume group using the vgextend command. First type df -h to find the name of the volume group.  In Figure C, the name of the volume group is vg_root. Now type vgextend [volume group] /dev/sdaX. (ex: vgextend vg_root /dev/sda4)

  23. To find the amount of free space available on the physical volume type vgdisplay [volume group] | grep “Free”

  24. Extend the logical volume by the amount of free space shown in the previous step by typing lvextend  -L+[freespace]G /dev/volgroup/volume. (ex: lvextend -L+20G /dev/vg_root/lv_root)

  25. You can finally expand the ext3 file system in the logical volume using the command resize2fs /dev/volgroup/volume (ex: resize2fs /dev/vg_root/lv_root).

  26. You can now run the df command to verify that you have more space–df -h

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