In this article I wrote about the Linux-Kernel and the GNU-Project, together they are called GNU/Linux.It is an Unix like Operating system and in the most cases POSIX-compliant and open source.The Kernel was firs released in the year 1991 from Linus Torvalds.


GNU/Linux is often used for Servers, there are a lot of open source software for work, a very powerful Shell and you have always Perl on the System.And the System needs not as much resources as Microsoft Systems.


I regularly use Debian or Mint,Debian is more stable, more for Servers and you could make a minimal installation with or without an GUI.Mint is more for Desktop users with a good looking Desktop.


For more take a look in the GNU/Linux Bash – Category

Perl serial key generator

The Problem is that I need a god solution to make a serial key in Perl, and so I wrote this program.You could give him a ID to generate a unique serial or you could just use the random function.


is the function for the serial, it generates 10 Blocks of 8 numbers, the first is the ID, with the ID you could generate the serial, then from 2-9 is the serial and the last block is a quick checksum.


It calculates a simple checksum from block 2-9 and number 10. the checksum.Its just a simple calculation to implement it in your client software so they don’t could reverse engineer your serial generator code.


This makes the full key check you should use this script only in your server software.


Serials from 1 to 20 :


This is a little test to make the client software in JavaScript:

but it only haves a different between 0 and 200 …. so its more try and error.



Thin client as web server

I bought a Fujitsu FUTRO S550-2, it cost about 160€(used with upgrades) I graded the ram from 512 to 2GB and the HDD from 1GB to 32GB.Its completely passive cooled and needs less space.


CPU AMD Sempron 200U 1 GHz


Overview:2015-03-27 13.47.16Back:

2015-03-27 13.46.51Inside:

2015-03-27 13.45.07Upgrade:

2015-03-27 13.41.42

RAM: Samsung M470T5663QZ3-CF7 – 2 GB – DDR2 (30€)

HDD: Kingston CF/32GB-U3 CompactFlash-Card Ultimate 600x – 32 GB (55€)



The Power usage is 15-18W, that’s sounds less but newer hardware needs the same for much more power.



All together its a nice PC for projects or web space, but if you need a little bite more power look at Silent PC for 260€ its a bite more expensive end needs more space but it have more power at the same power usage.If you just need webspace and a backup solution just take a look at  NAS Server Synology ds415+.

Silent PC for 260€

I build my own silent PC, and I mean realy silent so no fan no HDDs.The Price is about 260€(without chassis) and really cheap for a silent PC with this specs:

CPU  4x2GHz
 SSD  64GB

I used it for hosting hompages and as NAS.

I chooses this components:


Mainboard – ASRock Q1900DC-ITX

MainboardCPU: Intel Celeron J1900, 4x 2.00GHz, 2MB Cache, 10W TDP •
RAM: 2x DDR3 SO-DIMM, dual PC3L-10667S/DDR3L-1333, max. 16GB (UDIMM) •
1x VGA, 1x DVI-D, 1x HDMI 1.4, 2x USB 3.0 (J1900), 2x USB 2.0, 1x Gb LAN (Realtek RTL8111GR), 6x Klinke
2x SATA 6Gb/s (ASM1061), 2x SATA 3Gb/s, 1x CPU-Fan 3-Pin, 1x Fan 3-Pin, Audio: 7.1 (Realtek ALC892) • RAID-Level: N/A • Multi-GPU: N/A
Grafik: Intel HD Graphics (IGP)
Power: 1x DC-Stecker (9-19V)
Mini-ITX, UEFI, All solid capacitors, passiv cooling

Price: 100€


RAM – Kingston KVR13S9S8/4

Ram4GB (1333MHz, 204-pin, CL9) DDR3-RAM

Price per 4GB :35€ (I choose 2)


SSD – SanDisk SDSSDP-064G-G25

ssd64GB SATA III 2.5 Zoll
Read:490 MB/s
Write:240 MB/s



Power – Vanson SMP-70W

Power0 Power1

Input Voltage: AC 100 – 240 V
Frequency: 50/60 Hz
Output Voltage: 15 / 16 / 18 / 19 / 20 / 22 / 24 V




Its absolutely not hearable but you can add some silent fans to cool it down a bit for the summer, so it comes about 40°C, better take a look at CPU Temperature.



The Power usage is 12-15W.



All together its a real nice PC for small projects but for a NAS its not really nice because of the I/O.If you look for a NAS look at NAS Server Synology ds415+.