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Ubuntu

2 cent tip

Convert a PDF to black and white version

The problem: you have a PDF with some coloured elements (like some logo, separation lines, etc…) but you need a PDF in B/W. The solution: you can print your file (with a B/W printer) and then scan it 🙂 or, using GPL Ghostscript, run this command… gs -sDEVICE=pnggray -r150x150 -sOutputFile=output-%02d.png Read more…

By huntz, 9 yearsOctober 7, 2013 ago
Hardware

No default or UI configuration directive found! – boot from USB

When playing with unetbootin or some other software for converting a ISO image to a USB stick, you can get, trying to boot from USB, a message like this: ERROR: No configuration file found. No default or UI configuration directive found! Boot:_ You can fix this formatting the USB device Read more…

By huntz, 10 years ago
English

Zentyal: installation test and first impressions

Today I have to choose an operating system to replace a very old server with Windows 2000. Usually, when I have to do tasks like this one, I like getting my hands dirty with the old school approach: choose a very good Linux distribution (maybe CentOS) and setup all the Read more…

By huntz, 10 yearsOctober 13, 2012 ago
Apple

How to use RDP with VirtualBox

Recently using VirtualBox on Mac, I enabled the Remote Desktop Extension but no way to get it working. After a little research I have discovered you must install also the Oracle VM VirtualBox Extension Pack to get the RDP working. Apparently, the Extension Pack must be installed every time you Read more…

By huntz, 11 yearsSeptember 12, 2012 ago
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