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

Using Grep

GREP grep essentially prints lines matching a pattern. grep –options pattern file The grep command has a lot of useful option, including:

Working with linux permissions

Working with Permissions Permissions determine how users can access resources on a system.  System security is configured by the user’s UID (User ID), his GIDs (Group ID), (both primary and secondary), and the permissions on the object she is attempting to access. Permission Trio Bits The figure below shows the 10 positions (1 type bit… Read More »

Run Levels and Startup Scripts

In Linux there are 6 run levels, basically being the following: Init Level Description 0 This level is reserved for the shutdown phase. 1 Single-user mode (equivalent to Windows “safe mode”) 2 Multi-user setup without NFS (Network Filing System) 3 Full multi-user with networking, starting all required services 4 Typically unused but could be set… Read More »

A Few Linux Commands

a alias Create’s alias’s apt-get Package Manager for distro’s such as Ubuntu or debian based aspell Spell Checking tool arp Address Resolution Protocol, used to translate ip’s to hardware interface addresses awk Find and Replace text, database sort/validate/index b bash Bourne-Again SHell bc Arbitrary precision calculator language bg Launch in background break Quit a loop… Read More »

Welcome

Welcome. Soon the content will start rolling in, for the time being you can find some online tools in the Tools Section, tools such as an Online Nslookup, Facility to ping servers / computers, Port Scanner , Traceroute facility, a GeoIP tracking facility, telling you which country an ip address is located in. Soon i… Read More »