Updated : Jan 19, 2017 in Linux

SSH doesn’t accept my key since upgrade Mac OS X to Sierra

Introduction: I have two MacBooks. One that still has Mavericks OS X and one that I just upgrade to Sierra OS X. Since the upgrade…

Updated : Jan 11, 2017 in MAC OS X

Making a bootable USB stick using an .iso file on MAC

Introduction: Although Mac has been changed a lot since the days of Free-BSD it is still Unix and has lots of commands that are very…

Updated : Nov 07, 2016 in Linux

Extending SSD life expectancy by tuning Firefox

Introduction: If you are using Firefox and SSD drive(s) then according to this site: https://www.servethehome.com/firefox-is-eating-your-ssd-here-is-how-to-fix-it/ it is very recommended to make the small configuration change…

Updated : Oct 28, 2016 in MAC OS X

Activating TRIM support for non-Apple SSDs

Introduction: For a long time since the SSDs have appeared on the market, Apple had as default disabled the TRIP support for the SSDs IF…

Updated : Oct 05, 2016 in MAC OS X

Disable the ‘System Integrity Protection’ in Mac

Follow these steps: 1. Boot to Recovery OS by restarting your machine and holding down the Command and R keys at startup. 2. Launch Terminal…

Updated : Mar 09, 2016 in Apache

Testing SSL Connections with SSLyze, Nmap or OpenSSL

Introduction: OpenSSL is a great tool to check SSL connections to servers. The difficulty here is when one want a full scan of all possible…

Updated : Feb 22, 2016 in MAC OS X

Trouble installing Yosemite/El Capitan MAC OS X

Introduction: You downloaded Yosemite or El Capitan Mac OS X and decided to install it a month or so later. As you start to install…

Updated : Oct 12, 2015 in MAC OS X

How to upgrade your Mac from a rotary(regular) hard disk to an SSD.

Introduction: Very often friends that have a Mac or PC tell me that they need to buy a new Mac/PC because the present one has…

Updated : Apr 15, 2015 in Linux

How to create a bootable USB stick on OS X

This article is based on the following How-to in Ubuntu site: http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-mac-osx We would encourage Mac users to download Ubuntu Desktop Edition by burning a…

Updated : Apr 03, 2015 in Linux

Resuming files copy after break with rsync

In my work, I often need to transfer large files from my MAC desktop to a Linux server in Internet. Since the Internet connection is…