GNU/Linux

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.

serial

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.

quick_keycheck

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.

full_keycheck

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.

Hardware

CPU AMD Sempron 200U 1 GHz
RAM 2GB DDR2
SSD 32GB

 Images

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€)

 

Power

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

 

Conclusion

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
 RAM  8GB DDR3
 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

Price:52€

 

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

Price:34€

 

Noise

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.

 

Power

The Power usage is 12-15W.

 

Conclusion

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+.