Author Archives: Isaac Zarb

About Isaac Zarb

My professional interests are: Cyber Security, Fin-tech, POS Validation, Blockchain, Internet of Things, Highly available data-centers and cloud computing 
I specialise in Architecture and Design of Cloud Services, Blockchain, Azure, AWS, GCL, Datacenter Virtualisation, Security, and Web Technologies.

I typically manage projects using Agile methodologies such as SCRUM.
 My previous work experience includes architecture in highly scalable and performing CloudServices, Fin-tech and a passion for Security. • Heading IT Teams, Architecture at various sites in Malta and the UK, including Healthcare, iGaming, Banking, Fintech & Manufacturing. • Vast knowledge of virtualization products including cloud computing & Virtual Desktop solutions. • Fluent with various flavours of Linux, Windows, Exchange and SQL products • Seasoned in Networking, Security and Threat Management solutions •. Datacenter and cloud hosting management solutions. • Team and Unit Operations Management, business development and Client Facing experience • Passionate about security being PaloAlto networks evangelist and cyberforce member

Xenserver Lost Space

Many users have been experiencing problems in XenServer, Basically Used Space and Allocated space does not match, I too have encountered this issue, It is to do with the snapshotting feature, When a snapshot is deleted , Citrix XenServer should automatically reclaim the disk space by un allocating data which had been used by the snapshot,… Read More »

Forgot root password on ubuntu and ubuntu 9 running on Citrix Xenserver

If you have forgotten the password for your ubuntu server, the following steps may help you recover it On a traditional Pc BOOT PC Press ESC at the grub prompt. Press e to edit the kernel parameters. Select line that starts kernel ………, press e Go to the end of line, and add the following: … Read More »

Ubuntu 9.10 32Bit For Citrix Xenserver 5.x

Finally, after a long night of frustration, i have managed to get Ubuntu 9.10 working on xenserver, Basically, i had to leave out the update to grub 2, since the pygrub that comes with xenserver does’ not read Grub2 configs, and it also doesn’t read ext4, So This image uses the ext3 fs, and the… Read More »

Ubuntu 9.04 x64 Xenserver template

As requested here is the 64bit version of the ubuntu 9 template that runs on citrix xenserver paravirtualised. download link http://rapidshare.com/files/289417026/Ubuntux64.7z.001 http://rapidshare.com/files/289470456/Ubuntux64.7z.002 Unzip files with 7zip user name root pass: password the image is set as dhcp, has xen virtualised pv kernel and xenserver tools installed. Just import trough xencenter or the xe client, and… Read More »

Ubuntu 9.04 Xenserver 5.5 Template Paravirtualized

After reading many blogs, and trying for a while before succeeding, in creating an Ubuntu 9 pv template on xen, i have finally got it working, and have created a template which runs in PV mode, has the xentools installed and is avaliable for download for free. A paravirtualized Citrix Xenserver 5.5 template for Ubuntu 9.04 x32, you… Read More »