Monday, October 31, 2016

Update VMware Tools for UNetLab (UNL) to Stop Crashing Labs - "Error 20003"

When I was working with some larger typologies in UNL work space, labs got crashed many times because of this new method of adding links. Some times when nodes/links are added and deleted, it happened after auto refresh on webpage and shows "Error 20003" and you are done. If you have not backed up your lab with configurations you will not recover your lab again.

To stop this happening, VMware tools should be updated. I am running UNL on VMware workstation.

Go to VMware and go to VM > Install VMware Tools

SSH to the UNL machine.

Run these following commands:

Run this command to create a directory to mount the CD-ROM
sudo mkdir /mnt/cdrom

Run this command to mount the CD-ROM
sudo mount /dev/cdrom /mnt/cdrom

Run this command to find the exact name
ls /mnt/cdrom

It is 10.0.10-4301679 for me.

Run this command to extract the contents of the VMware Tools bundle
tar xzvf /mnt/cdrom/VMwareTools-x.x.x-xxxx.tar.gz -C /tmp/

Note: x.x.x-xxxx is the version discovered in the previous step.

Run this command to change directories into the VMware Tools distribution
cd /tmp/vmware-tools-distrib/

Run this command to install VMware Tools
sudo ./ -d

Now reboot the virtual machine
sudo reboot

3 comments to “Update VMware Tools for UNetLab (UNL) to Stop Crashing Labs - "Error 20003"”

  • June 2, 2017 at 12:09 AM
    KAZEEM YUSUF says:

    thank you roshan. This was so explanatory

  • June 8, 2017 at 12:40 PM
    Unknown says:

    Hello is there any location where the startup config of a broken lab are stored, My lab got corrupted and i do have error 2003 I am not able to open it againg and using ssh under the labs folder i see the lab name but the file has 0 Kb, i was wondering if the startup config are stored on a different folder0

  • June 11, 2017 at 12:24 AM

    @unknown, I am not sure about it. please ask from website forum for this. It's always a good practice if you clone your labs and backup configs frequently if you are using unl..


Post a Comment